{"title":"Scales \u0026 Testing","description":"\u003cp\u003eDial in accuracy and certainty at the bench and counter. This collection brings together pro-grade scales and verification tools for jewelers and buyers—from compact carat scales and NTEP legal-for-trade balances to diamond\/moissanite and precious-metal testers, plus classic acid kits and accessories. Brands include A\u0026amp;D, Ohaus, GemOro, and Presidium.\u003c\/p\u003e","products":[{"product_id":"gemoro-platinum-pro-1601-scale","title":"GemOro Counter Top Platinum Pro 1601 Multi Function Scale","description":"\u003cp\u003eThe \u003cstrong\u003eGemOro Platinum PRO 1601\u003c\/strong\u003e is a professional-grade multi-function scale built for jewelers, goldsmiths, and gemologists who require precision and reliability at the bench or in the field. With a 1600-gram maximum capacity — 60% greater than the Platinum PRO 1000V — this countertop scale delivers laboratory-level accuracy across six weighing modes. Dual power options, a stainless steel platform, and a full accessory kit make the PRO 1601 a complete weighing solution right out of the box.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Capacity \u0026amp; Precision:\u003c\/strong\u003e Weighs up to 1600 grams with 0.1 g readability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix Weighing Modes:\u003c\/strong\u003e Measures in grams, pennyweights, ounces troy, ounces avoirdupois, pounds, and grains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParts Counting Function:\u003c\/strong\u003e Streamlines repetitive weighing tasks for increased efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushbutton Calibration \u0026amp; Tare:\u003c\/strong\u003e Simple one-button operation with overload protection and auto-off function.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless Steel Weighing Platform:\u003c\/strong\u003e Durable surface with a removable splashguard dust cover for protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Feet \u0026amp; Leveling Bubble:\u003c\/strong\u003e Ensures stable, accurate readings on any surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Power Options:\u003c\/strong\u003e Operates on included AA batteries or the included universal 100–240V AC adaptor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-Year Limited Warranty:\u003c\/strong\u003e Backed by GemOro for long-term dependability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Capacity\u003c\/th\u003e\n\u003ctd\u003e1600 g (3.5 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReadability\u003c\/th\u003e\n\u003ctd\u003e0.1 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePennyweights Range\u003c\/th\u003e\n\u003ctd\u003e1030 x 0.1 dwt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOunces Troy Range\u003c\/th\u003e\n\u003ctd\u003e51.5 x 0.01 ozt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOunces Avoirdupois Range\u003c\/th\u003e\n\u003ctd\u003e56.5 x 0.01 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eAA batteries or 100–240V AC adaptor (both included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlatform Material\u003c\/th\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration Weight\u003c\/th\u003e\n\u003ctd\u003eStainless steel (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5-year limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGemOro Platinum PRO 1601 Scale\u003c\/li\u003e\n\u003cli\u003eStainless steel calibration weight\u003c\/li\u003e\n\u003cli\u003eRemovable splashguard\/dust cover\u003c\/li\u003e\n\u003cli\u003eUniversal 100–240V AC adaptor\u003c\/li\u003e\n\u003cli\u003eAA batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOffers 60% greater capacity than the GemOro Platinum PRO 1000V.\u003c\/li\u003e\n\u003cli\u003eIncludes calibration weight and protective accessories not bundled with the PRO 1000V.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43536346710230,"sku":"150.104","price":169.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-counter-top-platinum-pro-1601-multi-function-scale-otto-frei.jpg?v=1719959160"},{"product_id":"gemoro-2012-ce-auracle-pro-digital-gold-platinum-tester","title":"GemOro 2012-CE AuRACLE PRO Digital Gold and Platinum Tester","description":"\u003cp\u003eThe \u003cstrong\u003eGemOro 2012-CE AuRACLE PRO Digital Gold and Platinum Tester\u003c\/strong\u003e is an advanced, handheld instrument designed for fast, accurate, and reliable testing of gold and platinum. With 20% greater accuracy than earlier models, this CE-approved tester delivers instant results displaying both karat value and gold percentage — eliminating guesswork in precious metal verification. Whether testing yellow, white, rose, or green gold or platinum, the AuRACLE PRO gives professionals the confidence of digital precision in a compact, portable form.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTests all gold from 6K to 24K — yellow, white, rose, and green — plus platinum\u003c\/li\u003e\n\u003cli\u003eAlphanumeric LCD displays both karat value and gold percentage simultaneously\u003c\/li\u003e\n\u003cli\u003eTwo testing modes: Fast Test Yellow and Enhanced Mode\u003c\/li\u003e\n\u003cli\u003eSimple one-step calibration using 14K or 18K yellow gold\u003c\/li\u003e\n\u003cli\u003eScratch-resistant nickel-plated stainless steel testing plate\u003c\/li\u003e\n\u003cli\u003eAuto-check function verifies pen probe integrity before testing\u003c\/li\u003e\n\u003cli\u003eQuick \"NA\" detection for non-gold, gold-plated, or gold-filled items\u003c\/li\u003e\n\u003cli\u003eLow battery indicator and replaceable Gold Label pen probe\u003c\/li\u003e\n\u003cli\u003eErgonomic design with built-in probe storage\u003c\/li\u003e\n\u003cli\u003ePowered by 9V alkaline battery or included AC adapter (100–240V)\u003c\/li\u003e\n\u003cli\u003eCE approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e2012-CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTesting Range\u003c\/th\u003e\n\u003ctd\u003e6K to 24K gold (all colors), platinum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eDigital LCD showing karat \u0026amp; gold percentage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003e14K or 18K yellow gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e9V alkaline battery or 100–240V AC adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTest Plate Construction\u003c\/th\u003e\n\u003ctd\u003eNickel-plated stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertifications\u003c\/th\u003e\n\u003ctd\u003eCE Approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAuRACLE PRO tester unit\u003c\/li\u003e\n\u003cli\u003eGold Label pen probe\u003c\/li\u003e\n\u003cli\u003eJeweler's file\u003c\/li\u003e\n\u003cli\u003eAC adapter 100-240V with North American 2 prong plug\u003c\/li\u003e\n\u003cli\u003e9V alkaline battery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse only \u003cstrong\u003eGold Label analyzer replacement pen probes\u003c\/strong\u003e with this device — other probe types are not compatible.\u003c\/li\u003e\n\u003cli\u003eA plumb calibration gold piece is required for initial setup and is available separately (SKU: 156.799CAL). \u003cem\u003eOr use your own verified 18K plumb gold sample.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003eReplacement Gold Label pen probe available separately (SKU: 156.799-UNV).\u003c\/li\u003e\n\u003cli\u003eReplacement AC adapter available separately (SKU: 156.799ADP).\u003c\/li\u003e\n\u003cli\u003eLocally sourced plug adapter required for the AC adapter if outside North America \u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43536384393430,"sku":"156.796","price":549.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-auracle-pro-digital-gold-and-platinum-tester-otto-frei.jpg?v=1719959155"},{"product_id":"gemoro-platinum-pro501vxp-precision-digital-scale-500g-0-01g","title":"GemOro Platinum PRO501VXP Extra Precision Digital Countertop","description":"\u003cp\u003eThe \u003cstrong\u003eGemOro Platinum PRO501VXP\u003c\/strong\u003e is a countertop\/portable extra precision digital scale built for professional jewelers, findings dealers, precious metal buyers, and wholesalers. With a 500 g capacity and 0.01 g readability, it delivers reliable, repeatable results whether on the bench or in the field. A stainless steel platform, large backlit LCD, and dual power options make it a dependable everyday tool for any professional weighing application.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtra precision:\u003c\/strong\u003e 500 g capacity with 0.01 g readability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple weighing modes:\u003c\/strong\u003e g, oz, ozt, dwt, gn, ct.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParts counting function (PCS):\u003c\/strong\u003e Streamlines batch and findings counting.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOne-touch operation:\u003c\/strong\u003e Pushbutton digital calibration, tare, memory, overload protection, and auto-off.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLarge blue backlit LCD:\u003c\/strong\u003e Easy to read in varied lighting conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable setup:\u003c\/strong\u003e Adjustable-height feet and leveling bubble indicator.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable platform:\u003c\/strong\u003e Stainless steel weighing surface with EZ-grip rubberized black finish housing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible power:\u003c\/strong\u003e Runs on four AA batteries or the included 100–240V universal AC adaptor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eCapacity \/ Readability\u003c\/th\u003e\n\u003ctd\u003e500 g × 0.01 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWeighing Units\u003c\/th\u003e\n\u003ctd\u003eGrams (g), Ounces (oz), Ounces Troy (ozt), Pennyweights (dwt), Grains (gn), Carats (ct)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eFunctions\u003c\/th\u003e\n\u003ctd\u003eDigital calibration, tare, memory, overload protection, auto-off, parts counting (PCS)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLeveling\u003c\/th\u003e\n\u003ctd\u003eAdjustable feet with bubble level\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eLarge blue backlit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e4 × AA batteries (included) or universal 100–240V AC adaptor (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eHousing Finish\u003c\/th\u003e\n\u003ctd\u003eBlack EZ-grip rubberized paint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGemOro Platinum PRO501VXP scale\u003c\/li\u003e\n  \u003cli\u003e(2) 200 g calibration weights\u003c\/li\u003e\n  \u003cli\u003eUniversal 100–240V AC adaptor\u003c\/li\u003e\n  \u003cli\u003e(4) AA batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBattery\/shipping notice:\u003c\/strong\u003e This product includes batteries and cannot ship via air or outside the United States with the included batteries. If an air shipping method is selected (FedEx\/UPS 3-Day, 2-Day, or Next Day) or the destination is outside the U.S., the batteries will be removed from the shipment.\u003c\/p\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43536386031830,"sku":"150.126","price":99.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-platinum-pro501vxp-extra-precision-digital-countertop-otto-frei.jpg?v=1719959153"},{"product_id":"and-ek-6000i-legal-for-trade-multi-function-scale","title":"AND EK-6000i Legal For Trade Mulit-Function Scale","description":"\u003cp\u003eThe A\u0026amp;D EK-6000i is a legal-for-trade, multi-function bench scale designed for everyday shop use. It provides a 6000 g capacity with 1.0 g readability, a backlit LCD for clear viewing, and RS-232 output for data transfer. The stainless steel pan and broad range of weighing units make it well suited for bulk metals, findings, gemstones, and packaging tasks. Includes a 120 V\/60 Hz AC\/DC adapter and supports an optional rechargeable battery pack. Backed by A\u0026amp;D's 5-year warranty.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLegal for trade:\u003c\/strong\u003e suitable for buying and selling by weight when installed and approved by local Weights \u0026amp; Measures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity \u0026amp; readability:\u003c\/strong\u003e 6000 g × 1.0 g for bulk metals, findings, and packaging tasks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-unit weighing:\u003c\/strong\u003e g, oz (AV), ozt (troy), lb, dwt, ct, Tael, MOM, plus % and counting modes (counting not legal for trade).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e RS-232 output for data recording and integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUsability:\u003c\/strong\u003e large backlit LCD for clear viewing; stainless steel pan.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e AC\/DC 120 V\/60 Hz adapter included; optional OP-09 rechargeable battery; optional 240 V adapter TB:164 (special order).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 5-year factory warranty from A\u0026amp;D.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eEK-6000i\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCapacity \/ Readability\u003c\/th\u003e\n\u003ctd\u003e6000 g × 1.0 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eUnits\u003c\/th\u003e\n\u003ctd\u003eg, oz (AV), ozt (troy), lb, dwt, ct, Tael, MOM, count, %\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePan Size\u003c\/th\u003e\n\u003ctd\u003e5.2\" × 6.7\" (132 mm × 170 mm), stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eLarge backlit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eRS-232\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eAC\/DC 120 V\/60 Hz adapter (included); optional OP-09 rechargeable battery; optional 240 V adapter TB:164 (special order)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLegal for Trade\u003c\/th\u003e\n\u003ctd\u003eYes; final approval depends on local Weights \u0026amp; Measures authority\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5 years (A\u0026amp;D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eA\u0026amp;D EK-6000i scale\u003c\/li\u003e\n  \u003cli\u003eAC\/DC 120 V\/60 Hz adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eNTEP evaluations reference NIST Handbook 44; some states require an NTEP Certificate of Conformance.\u003c\/li\u003e\n  \u003cli\u003eFinal approval for commercial use is determined by your state or local Weights \u0026amp; Measures official based on installation and suitability.\u003c\/li\u003e\n  \u003cli\u003eCounting mode is not legal for trade.\u003c\/li\u003e\n  \u003cli\u003eFor general reference, see the \u003cem\u003eNational Conference on Weights and Measures (NCWM)\u003c\/em\u003e at ncwm.com.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AND Scales","offers":[{"title":"Default Title","offer_id":43536392552662,"sku":"151.044","price":526.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/and-ek-6000i-legal-for-trade-mulit-function-scale-otto-frei.jpg?v=1719959153"},{"product_id":"ad-ek-300i-precision-balance-scale-0-01g","title":"A\u0026D EK-300i Scale-Accurate to 0.01 Gram","description":"\u003cp\u003eThe A\u0026amp;D EK-300i is a compact, multi-function balance for bench work that demands 0.01 g readability. It includes RS-232 for data output, runs on the included 120 V AC adapter or batteries, and supports multiple weighing units for jewelry, metals, and general shop use.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh readability:\u003c\/strong\u003e 0.01 g for precise results—ten times finer than 0.1 g scales.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-unit modes:\u003c\/strong\u003e grams, pennyweight (dwt), troy ounces (ozt), ounces (AV), carats (0.05 ct), pounds (AV), grains, Tael, Momme, pieces (count), and percent.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e RS-232 output for data recording and transfer.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower options:\u003c\/strong\u003e 120 V AC adapter included; also battery operable. Optional 240 V adapter (TB-164, special order).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 5-year factory warranty from A\u0026amp;D.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eEK-300i\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCapacity \/ Readability\u003c\/th\u003e\n\u003ctd\u003e300 g × 0.01 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePan Size\u003c\/th\u003e\n\u003ctd\u003e⌀ 4.3 in (≈ 109 mm), stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDimensions (W × D × H)\u003c\/th\u003e\n\u003ctd\u003e7-1\/2\" × 8-3\/4\" × 2-1\/4\" (≈ 190.5 × 222.3 × 57.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eUnits\u003c\/th\u003e\n\u003ctd\u003eg, dwt, ozt, oz (AV), ct (0.05 ct), lb (AV), grain, Tael, Momme, count, %\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eRS-232\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e120 V AC adapter (included) or batteries; optional 240 V adapter TB-164 (special order)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5 years (A\u0026amp;D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eA\u0026amp;D EK-300i scale\u003c\/li\u003e\n  \u003cli\u003e120 V AC adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCarat resolution is 0.05 ct—sufficient for larger stones, not intended for diamond-grade carat work.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AND Scales","offers":[{"title":"Default Title","offer_id":43552946258134,"sku":"151.041","price":427.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/aandd-ek-300i-scale-accurate-to-0-01-gram-otto-frei.jpg?v=1719959074"},{"product_id":"presidium-ac-adaptor-120v-220v","title":"Presidium AC Adaptors-120V or 220V","description":"\u003cp\u003ePresidium AC Adaptors provide reliable mains power for a range of Presidium gem-testing instruments, replacing or supplementing battery operation. Available in 120V and 220V configurations to suit North American and international electrical standards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCompatible instruments include:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePresidium Multitester I and II (PMUT \u0026amp; PMUT II)\u003c\/li\u003e\n\u003cli\u003ePresidium Diamondmate (PDMT)\u003c\/li\u003e\n\u003cli\u003ePresidium Moissanite Tester (PMT)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The 120V AC adaptor (part # 156.753) is \u003cem\u003enot\u003c\/em\u003e compatible with the current-generation Presidium Multitester III (PMUT III). For the PMUT III, use part # 156.753NEW.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003ePresidium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Voltages\u003c\/th\u003e\n\u003ctd\u003e120V, 220V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eAvailable Options\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e156.753\u003c\/td\u003e\n\u003ctd\u003e120V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e156.753.220\u003c\/td\u003e\n\u003ctd\u003e220V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThe 120V adaptor (156.753) is intended for use with Presidium Multitester Series I and II, the Diamondmate, and the Moissanite Tester only. It is \u003cem\u003enot\u003c\/em\u003e for use with the Presidium Multitester III (PMUT III). Select the correct voltage for your region before ordering.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"120V","offer_id":43578756301014,"sku":"156.753","price":17.0,"currency_code":"USD","in_stock":true},{"title":"220V","offer_id":45125507973334,"sku":"156.753.220","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/presidium-ac-adaptors-120v-or-220v-otto-frei.jpg?v=1689352325"},{"product_id":"gemoro-xp500ss-precision-pocket-scale","title":"GemOro Platinum XP500SS Premium Class Pocket Scale","description":"\u003cp\u003eThe GemOro Platinum XP500SS is a premium-class pocket scale engineered for jewelers and gold buyers who demand exceptional precision. While most scales offer standard accuracy of 0.1g, the XP500SS delivers 10 times greater accuracy at \u003cstrong\u003e0.01g resolution\u003c\/strong\u003e — a critical advantage when weighing high-value metals and gemstones. With a maximum capacity of 500g, this scale handles everything from delicate findings to larger lots without sacrificing precision.\u003c\/p\u003e\u003cp\u003eThe extra-large stainless steel weighing platform sets the XP500SS apart from other high-precision pocket scales, providing ample surface area for jewelry, findings, and loose stones. A bright blue backlit LCD display ensures clear readability from any angle or lighting condition, making it equally practical on a busy bench or at a trade show.\u003c\/p\u003e\u003cp\u003eFinished in a black EZ-grip rubberized paint, the XP500SS is built for durability and confident handling. The included protective cover doubles as a low-profile tray, keeping your workspace organized while protecting the platform when not in use.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e0.01g resolution — 10× more accurate than standard 0.1g scales\u003c\/li\u003e\n\u003cli\u003e500g maximum capacity\u003c\/li\u003e\n\u003cli\u003eExtra-large stainless steel weighing platform\u003c\/li\u003e\n\u003cli\u003eBright blue backlit LCD display for clear viewing at any angle\u003c\/li\u003e\n\u003cli\u003eWeighs in six units: grams, pennyweights (dwt), troy ounces (ozt), carats (ct), grains (gn), and ounces avoirdupois (oz)\u003c\/li\u003e\n\u003cli\u003ePush-button digital calibration for consistent accuracy\u003c\/li\u003e\n\u003cli\u003eTare, memory, low battery indicator, and battery-saving auto-off functions\u003c\/li\u003e\n\u003cli\u003eConvenient 4-button control panel\u003c\/li\u003e\n\u003cli\u003eBlack EZ-grip rubberized paint finish for secure handling\u003c\/li\u003e\n\u003cli\u003eProtective cover included — doubles as a jewelry and findings tray\u003c\/li\u003e\n\u003cli\u003ePowered by 2 included long-life AAA alkaline batteries\u003c\/li\u003e\n\u003cli\u003e5-year limited replacement warranty from GemOro\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e500g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e0.01g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeighing Units\u003c\/th\u003e\n\u003ctd\u003eg, dwt, ozt, ct, gn, oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eBacklit LCD with blue illumination\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePlatform Material\u003c\/th\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eBlack EZ-grip rubberized paint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Source\u003c\/th\u003e\n\u003ctd\u003e2 × AAA alkaline batteries (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5-year limited replacement warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eXP500SS pocket scale\u003c\/li\u003e\n\u003cli\u003eExtra-large and low-profile protective cover\/tray\u003c\/li\u003e\n\u003cli\u003e2 long-life AAA alkaline batteries\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43579749957846,"sku":"150.106","price":35.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-platinum-xp500ss-premium-class-pocket-scale-otto-frei.jpg?v=1719958479"},{"product_id":"and-ek-1200i-legal-for-trade-multi-function-scale","title":"AND EK-1200i Legal For Trade Multi-Function Scale","description":"\u003cp\u003eThe A\u0026amp;D EK-1200i is a compact, legal-for-trade multi-function scale built for professional jewelry shops, bullion dealers, and metalsmithing studios. With a 1200 g capacity and 0.1 g readability, it delivers reliable precision across a wide range of weighing units — from grams and carats to pennyweights, troy ounces, and Momme. A sealed keypad, stainless steel pan, large backlit LCD, and RS-232 data output make this scale a dependable bench tool for daily commercial use. Legal-for-trade status enables buying and selling by weight once installed and approved by your local Weights \u0026amp; Measures authority.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLegal for trade:\u003c\/strong\u003e suitable for commercial transactions when installed to local Weights \u0026amp; Measures requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh readability:\u003c\/strong\u003e 0.1 g resolution for reliable results on metals and larger stones.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-unit weighing:\u003c\/strong\u003e grams, carats, pennyweights, troy ounces, ounces (AV), pounds, grains, Tael (HK General), and Momme.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounting \u0026amp; percent modes:\u003c\/strong\u003e parts counting to approximately 12,000 pieces and percent weighing (counting and percent modes are not legal for trade).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS-232 connectivity:\u003c\/strong\u003e data output with GLP I.D.\/serial output for record-keeping and system integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable construction:\u003c\/strong\u003e stainless steel pan, sealed key panel, overload protection, and auto power-off.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComparator function:\u003c\/strong\u003e HI\/OK\/LO display for quick go\/no-go weighing checks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5-year factory warranty\u003c\/strong\u003e from A\u0026amp;D.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eEK-1200i\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e1200 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eReadability\u003c\/th\u003e\n\u003ctd\u003e0.1 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWeighing Units\u003c\/th\u003e\n\u003ctd\u003eg, ct, dwt, ozt, oz (AV), lb (AV), grain, Tael (HK General), Momme, pieces (count), %\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eMode Capacities\u003c\/th\u003e\n\u003ctd\u003eg: 1200 × 0.1 | dwt: 771 × 0.1 | ozt: 38.58 × 0.005 | oz (AV): 42.33 × 0.005 | ct: 6000 × 0.5 | lb (AV): 2.6455 × 0.0005 | grain: 1851 × 2 | Tael (HK General): 31.745 × 0.005 | Momme: 320 × 0.05 | Count: up to ~12,000 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePan Size\u003c\/th\u003e\n\u003ctd\u003e133 mm × 170 mm (5.25 in × 6.75 in), stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eUnit Dimensions\u003c\/th\u003e\n\u003ctd\u003e7.5\" × 8.75\" × 2.125\"\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eLarge wide-angle backlit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eRS-232C; GLP I.D.\/serial output\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eFull digital calibration (local LFT sealing\/approval required)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eAC\/DC 120 V\/60 Hz adaptor included; optional OP-09 rechargeable battery; optional 240 V adaptor TB:164 (special order)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLegal for Trade\u003c\/th\u003e\n\u003ctd\u003eYes — requires installation and approval by local Weights \u0026amp; Measures authority\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5 years (A\u0026amp;D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eA\u0026amp;D EK-1200i scale\u003c\/li\u003e\n  \u003cli\u003eAC\/DC 120 V\/60 Hz adaptor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eNTEP evaluations are based on NIST Handbook 44; some states require an NTEP Certificate of Conformance.\u003c\/li\u003e\n  \u003cli\u003eFinal approval for legal-for-trade use depends on your state or local Weights \u0026amp; Measures official, including installation and suitability review.\u003c\/li\u003e\n  \u003cli\u003eCounting and percent weighing modes are not approved for legal-for-trade use.\u003c\/li\u003e\n  \u003cli\u003eFor general reference on weights and measures requirements, see the National Conference on Weights and Measures (NCWM) at ncwm.com.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AND Scales","offers":[{"title":"Default Title","offer_id":43579769651414,"sku":"151.042","price":370.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/and-ek-1200i-legal-for-trade-multi-function-scale-otto-frei.jpg?v=1719958462"},{"product_id":"gemoro-platinum-pro1001v-digital-balance-1000g-0-1g","title":"GemOro Platinum PRO1001V Digital Countertop\/Portable Balance","description":"\u003cp\u003eThe \u003cstrong\u003eGemOro Platinum PRO1001V\u003c\/strong\u003e is a precision countertop and portable digital balance designed for jewelers, precious metal buyers, and gold wholesalers. Combining a 1000 g capacity with 0.1 g readability, a large stainless steel platform, and a bright backlit display, it delivers professional-grade performance and long-term reliability in a sleek low-profile form factor suited for both bench and mobile use.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh capacity and accuracy:\u003c\/strong\u003e 1000 g capacity with 0.1 g readability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple weighing modes:\u003c\/strong\u003e g, oz, ozt, dwt, gn, ct, and kg.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParts counting (PCS):\u003c\/strong\u003e Ideal for repetitive counting and weighing tasks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy operation:\u003c\/strong\u003e Pushbutton calibration, tare, memory, overload protection, and auto-off function.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear visibility:\u003c\/strong\u003e Large bright blue backlit LCD display for easy reading in any lighting condition.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable platform:\u003c\/strong\u003e Large stainless steel weighing surface with adjustable height feet and a built-in leveling bubble indicator.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePortable power:\u003c\/strong\u003e Runs on (4) AA alkaline batteries (included).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable construction:\u003c\/strong\u003e Contoured low-profile housing for professional bench or mobile use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eCapacity \/ Readability\u003c\/th\u003e\n\u003ctd\u003e1000 g × 0.1 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWeighing Units\u003c\/th\u003e\n\u003ctd\u003eg, oz, ozt, dwt, gn, ct, kg\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eFunctions\u003c\/th\u003e\n\u003ctd\u003eCalibration, tare, memory, overload protection, auto-off, parts counting\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003ctd\u003eLarge stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eBright blue backlit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLeveling\u003c\/th\u003e\n\u003ctd\u003eAdjustable height feet with bubble indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e(4) AA alkaline batteries (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGemOro Platinum PRO1001V Scale\u003c\/li\u003e\n  \u003cli\u003e(4) AA alkaline batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOptional universal 100–240V AC adapter available separately (Item #9746).\u003c\/li\u003e\n  \u003cli\u003eOptional (2) 200 g calibration weights available separately (Item #9747-1).\u003c\/li\u003e\n  \u003cli\u003eSuitable for jewelry manufacturing and repair, scrap gold and precious metal purchasing, and jewelry retail and appraisal settings.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43579770175702,"sku":"150.122","price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-platinum-pro1001v-digital-countertopportable-balance-otto-frei.jpg?v=1719958460"},{"product_id":"presidium-pdt-duo-tester-diamond-gemstone-identifier","title":"Presidium PDT Duo Tester-Identify Diamonds \u0026 Colored Stones","description":"\u003cp\u003eThe Presidium PDT Duo Tester combines two distinct testing methods into a single professional instrument, giving jewelers and gemologists the tools needed to accurately identify diamonds, diamond simulants — including synthetic moissanite — and popular colored gemstones. Unlike a standard thermal tester alone, this unit simultaneously performs both thermal conductivity testing and digital reflectivity measurement through a single probe at the press of one button.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual testing technology:\u003c\/strong\u003e Thermal conductivity testing and digital reflectivity measurement are performed simultaneously through the same testing probe with a single press of the test button\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDigital reflectivity meter:\u003c\/strong\u003e Provides a numeric readout that cross-references with the included Simulant Reflectivity Chart to identify the stone based on its refractive index\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalog needle thermal display:\u003c\/strong\u003e Easy-to-read dial calibrated to indicate differences in thermal conductivity across popular gemstones and simulants; diamond readings fall in a clearly marked green zone, colored gemstones in labeled red zones\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMoissanite detection:\u003c\/strong\u003e Reflectivity meter confirms or rules out synthetic moissanite, which shares the same thermal characteristics as diamond and cannot be distinguished by thermal testing alone\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorks on mounted and loose stones:\u003c\/strong\u003e Thermal probe tests both mounted and loose gemstones; even coated stones can be accurately tested\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMetal warning detector:\u003c\/strong\u003e Thermal probe pen emits an audible buzz if the gem mounting is accidentally contacted during testing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilt-in calibration standards:\u003c\/strong\u003e Includes integrated diamond and simulant test discs for thermal tester calibration, plus a built-in diamond substitute set for reflectivity meter calibration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSample stone tray:\u003c\/strong\u003e Slide-out tray with plastic cover holds seven calibration stones — YAG, Cubic Zirconia, Zircon, Strontium Titanate, GGG, Synthetic Spinel, and Synthetic Sapphire — each approximately 5.0 mm in diameter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible power options:\u003c\/strong\u003e Operates on 5 AA alkaline batteries or the included 120V AC adapter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-year factory warranty:\u003c\/strong\u003e Each unit is tested for functionality before shipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eTesting Methods\u003c\/th\u003e\n\u003ctd\u003eThermal conductivity (analog needle) and digital reflectivity measurement\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eAnalog needle dial (thermal) and digital readout (reflectivity)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCalibration Stones Included\u003c\/th\u003e\n\u003ctd\u003e7 stones: YAG, Cubic Zirconia, Zircon, Strontium Titanate, GGG, Synthetic Spinel, Synthetic Sapphire (~5.0 mm diameter each)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e5 AA alkaline batteries or 120V AC adapter (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e2-year factory warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003ePresidium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePresidium PDT Duo Tester instrument\u003c\/li\u003e\n  \u003cli\u003eThermal testing probe\u003c\/li\u003e\n  \u003cli\u003eSimulant Reflectivity Chart\u003c\/li\u003e\n  \u003cli\u003eBuilt-in diamond and simulant test discs\u003c\/li\u003e\n  \u003cli\u003eBuilt-in diamond substitute set (7 calibration stones in slide-out tray with plastic cover)\u003c\/li\u003e\n  \u003cli\u003e120V AC adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAll stones identified as diamond by the thermal tester should also be tested with the reflectivity meter to rule out synthetic moissanite, as moissanite shares the same thermal conductivity as diamond.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Presidium","offers":[{"title":"Default Title","offer_id":43581433217238,"sku":"156.756","price":423.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/presidium-pdt-duo-tester-identify-diamonds-and-colored-stones-otto-frei-1.jpg?v=1719957558"},{"product_id":"presidium-gem-tester-ii-pgt-ii-thermal-gem-tester","title":"Presidium Gem Tester II","description":"\u003cp\u003eIs it a diamond or moissanite? Ruby or garnet? Sapphire or tanzanite? Emerald or jadeite? The \u003cstrong\u003ePresidium Gem Tester II (PGT II)\u003c\/strong\u003e provides fast, laboratory-proven answers for jewelers and gemologists working with both mounted and loose stones. This professional-grade color stone estimator eliminates human error in gem identification by measuring the rate at which different gemstones conduct heat — a physical property unique to each stone type.\u003c\/p\u003e\u003cp\u003eSimply touch the sophisticated thermoelectric probe to the surface of any stone, and the specially calibrated dial displays the relative heat conductivity of the material, allowing for rapid identification across the most popular precious gemstone families. The PGT II is the latest generation of the Presidium Gem Tester and introduces an updated, easier-to-read display along with an important new \u003cstrong\u003eDiamond\/Moissanite\u003c\/strong\u003e indicator. Because moissanite conducts heat at a rate identical to diamond, the updated dial now alerts the user when a stone falls within that range — signaling that additional visual testing is required to distinguish between the two.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eMoissanite can be identified visually using a 10x loupe, as moissanite exhibits double refraction. Diamond does not.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIdentifies diamond and separates the most popular colored gemstones from one another\u003c\/li\u003e\n\u003cli\u003eUpdated display now reads \u003cstrong\u003eDiamond\/Moissanite\u003c\/strong\u003e — alerts user when further visual testing is needed\u003c\/li\u003e\n\u003cli\u003eThermoelectric probe measures heat conductivity unique to each gemstone type\u003c\/li\u003e\n\u003cli\u003eSolid-state probe pen requires \u003cstrong\u003eno warm-up time\u003c\/strong\u003e between tests\u003c\/li\u003e\n\u003cli\u003eBuilt-in \u003cstrong\u003emetal detector\u003c\/strong\u003e alerts user if the probe touches a metal mounting instead of the stone\u003c\/li\u003e\n\u003cli\u003eWorks on both mounted and loose stones\u003c\/li\u003e\n\u003cli\u003eTwo calibration test discs mounted directly into the unit frame\u003c\/li\u003e\n\u003cli\u003eLightweight and portable design\u003c\/li\u003e\n\u003cli\u003eDual power: operates on two AA batteries or included 110V AC adapter\u003c\/li\u003e\n\u003cli\u003e1-year factory warranty included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Source\u003c\/th\u003e\n\u003ctd\u003eTwo (2) AA 1.5V batteries or 110V AC adapter (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProbe Type\u003c\/th\u003e\n\u003ctd\u003eSolid-state thermoelectric probe — no warm-up required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eTwo test discs mounted in frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMetal Detection\u003c\/th\u003e\n\u003ctd\u003eBuilt-in metal detector alerts when probe contacts metal mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e1-year factory warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReturn Policy\u003c\/th\u003e\n\u003ctd\u003eOtto Frei 30-day satisfaction guaranteed return policy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThe Presidium Gem Tester II \u003cstrong\u003ecannot distinguish between diamond and moissanite\u003c\/strong\u003e by thermal conductivity alone, as both materials conduct heat at the same rate. When a stone tests in the Diamond\/Moissanite range, visual inspection with a 10x loupe is recommended. Moissanite displays double refraction under magnification; diamond does not.\u003c\/p\u003e","brand":"Presidium","offers":[{"title":"Default Title","offer_id":43581433807062,"sku":"156.750","price":314.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/presidium-gem-tester-ii-otto-frei-1.jpg?v=1719957557"},{"product_id":"presidium-pmut-iii-multi-tester-diamond-moissanite","title":"Presidium PMuT III Multi Tester","description":"\u003cp\u003eThe \u003cstrong\u003ePresidium PMuT III Multi Tester\u003c\/strong\u003e is a premium all-in-one instrument that combines thermal and electrical conductivity testing to identify diamonds, moissanite, diamond simulants, and cubic zirconia. Designed for professional jewelers who need fast, reliable stone identification, this tester delivers nearly instantaneous results through an intuitive color-coded LED indicator system and audible alerts—eliminating guesswork at the bench.\u003c\/p\u003e\u003cp\u003eSimply place the retractable probe against the stone to be tested. The visual indicator illuminates in one of four colors: \u003cstrong\u003eorange for metal\u003c\/strong\u003e, \u003cstrong\u003ered for simulant\u003c\/strong\u003e, \u003cstrong\u003eyellow for moissanite\u003c\/strong\u003e, and \u003cstrong\u003egreen for diamond\u003c\/strong\u003e. An intermittent beep sounds when metal is detected, while a confirmed diamond result produces a continuous beep for added certainty.\u003c\/p\u003e\u003cp\u003eThe PMuT III can be powered by three AAA batteries (not included) or an optional 110V AC adaptor. Because this is a high-drain electronic device, the AC adaptor is strongly recommended—three AAA batteries can be fully discharged in under 2½ hours of continuous use.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCombines thermal and electrical conductivity testing in one instrument\u003c\/li\u003e\n\u003cli\u003eIdentifies diamonds, moissanite, diamond simulants, and cubic zirconia\u003c\/li\u003e\n\u003cli\u003eRetractable probe for safe, precise stone contact\u003c\/li\u003e\n\u003cli\u003eColor-coded LED results: orange (metal), red (simulant), yellow (moissanite), green (diamond)\u003c\/li\u003e\n\u003cli\u003eAudible alerts: intermittent beep for metal, continuous beep for diamond\u003c\/li\u003e\n\u003cli\u003eNear-instantaneous test results\u003c\/li\u003e\n\u003cli\u003ePowered by three AAA batteries or optional 110V AC adaptor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Source\u003c\/th\u003e\n\u003ctd\u003e3 × AAA batteries (not included) or optional 110V AC adaptor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTesting Method\u003c\/th\u003e\n\u003ctd\u003eCombined thermal and electrical conductivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStones Identified\u003c\/th\u003e\n\u003ctd\u003eDiamond, moissanite, diamond simulants, cubic zirconia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProbe Type\u003c\/th\u003e\n\u003ctd\u003eRetractable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThe 110V AC adaptor is \u003cstrong\u003ehighly recommended\u003c\/strong\u003e for regular bench use. As a high-drain device, the PMuT III can deplete three AAA batteries in less than 2½ hours of continuous operation. Batteries are not included.\u003c\/p\u003e","brand":"Presidium","offers":[{"title":"Default Title","offer_id":43581434724566,"sku":"156.752","price":245.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/presidium-pmut-iii-multi-tester-otto-frei.jpg?v=1719957557"},{"product_id":"presidium-pdmt-a-diamondmate-diamond-tester","title":"Presidium PDMT-A DiamondMate Diamond Tester","description":"\u003cp\u003eThe \u003cstrong\u003ePresidium PDMT-A DiamondMate\u003c\/strong\u003e is a handheld diamond tester that uses thermal conductivity to quickly separate diamonds from most known simulants. Compact and easy to use, it is built for jewelers, gemologists, and appraisers who need a dependable screening tool at the bench or in the field. The retractable probe tip promotes correct testing technique and extends tip life, while dual indicators — continuous beep for diamond, intermittent beep for metal contact — deliver clear, unambiguous results with no waiting time between tests.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDistinguishes diamonds from all known simulants except moissanite\u003c\/li\u003e\n\u003cli\u003eNo waiting time required between tests\u003c\/li\u003e\n\u003cli\u003eContinuous beep confirms positive diamond identification\u003c\/li\u003e\n\u003cli\u003eIntermittent beep indicates probe contact with metal\u003c\/li\u003e\n\u003cli\u003eVisual light indicator accompanies audible signals\u003c\/li\u003e\n\u003cli\u003eRetractable probe tip promotes accurate technique and extends tip life\u003c\/li\u003e\n\u003cli\u003eLow battery indicator alerts before power loss\u003c\/li\u003e\n\u003cli\u003eUp to 7 hours of continuous use per set of batteries\u003c\/li\u003e\n\u003cli\u003ePowered by 3 AAA batteries (not included) or optional 120V AC adapter\u003c\/li\u003e\n\u003cli\u003eFull one-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003ePDMT-A DiamondMate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e6-1\/4\" L x 1-1\/8\" W x 3\/4\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Source\u003c\/th\u003e\n\u003ctd\u003e3 x AAA batteries (not included) or optional AC adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery Life\u003c\/th\u003e\n\u003ctd\u003eUp to 7 hours continuous use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIndicators\u003c\/th\u003e\n\u003ctd\u003eVisual light and audible beep (continuous = diamond; intermittent = metal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProbe Tip\u003c\/th\u003e\n\u003ctd\u003eRetractable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePresidium PDMT-A DiamondMate tester\u003c\/li\u003e\n\u003cli\u003eCarrying case\u003c\/li\u003e\n\u003cli\u003eDetailed instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMoissanite shares the same thermal conductivity as diamond and will be identified as diamond by this tester.\u003c\/li\u003e\n\u003cli\u003eTo differentiate moissanite from diamond, a moissanite-specific tester or multi-function tester is required.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Presidium","offers":[{"title":"Default Title","offer_id":43581436887254,"sku":"156.751","price":122.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/presidium-pdmt-a-diamondmate-diamond-tester-otto-frei.jpg?v=1719957558"},{"product_id":"tb-289gel-gel-tubes-tri-electronics","title":"TB-289GEL Tubes For Tri-Electronics GT-3000 \u0026 GXL-18","description":"\u003cp\u003eThe TB-289GEL Gel Tubes are the standard replacement gel tubes designed for use with Tri-Electronics gold testing instruments. Proper gel viscosity is essential for accurate electronic gold testing, and these tubes ensure your tester performs as intended. To maintain optimal gel consistency, store tubes in a cool location—heat and age will affect viscosity over time.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStandard gel tubes designed for Tri-Electronics gold testers\u003c\/li\u003e\n\u003cli\u003eCompatible with the Tri-Electronics G1, GT-3000, and GXL-18 models\u003c\/li\u003e\n\u003cli\u003eProper gel viscosity supports accurate test results\u003c\/li\u003e\n\u003cli\u003eMust be stored in a cool place to preserve gel integrity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eHeat and age will affect the viscosity of the gel. Store tubes in a cool environment to extend shelf life and maintain testing accuracy.\u003c\/p\u003e","brand":"Tri-Electronics","offers":[{"title":"Default Title","offer_id":43581611081942,"sku":"156.766","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/tb-289gel-tubes-for-tri-electronics-gt-3000-and-gxl-18-otto-frei.jpg?v=1719957499"},{"product_id":"tri-electronics-replacement-sensor-g1-gt3000-gxl18","title":"Sensor For Tri-Electronics G-1, GT-3000 \u0026 GXL-18","description":"\u003cp\u003eKeep your Tri-Electronics gold testing equipment performing accurately with this direct replacement sensor, designed specifically for the \u003cstrong\u003eG-1\u003c\/strong\u003e, \u003cstrong\u003eGT-3000\u003c\/strong\u003e, and \u003cstrong\u003eGXL-18\u003c\/strong\u003e models. When the original sensor wears out or becomes damaged, this replacement restores your tester to proper working condition without the need to replace the entire unit.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement sensor for Tri-Electronics gold testers\u003c\/li\u003e\n\u003cli\u003eCompatible with G-1, GT-3000, and GXL-18 models\u003c\/li\u003e\n\u003cli\u003eRestores accurate testing performance to your existing unit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eGel tubes are sold separately and are not included with this sensor.\u003c\/p\u003e","brand":"Tri-Electronics","offers":[{"title":"Default Title","offer_id":43581611868374,"sku":"156.783","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/sensor-for-tri-electronics-g-1-gt-3000-and-gxl-18-otto-frei.jpg?v=1719957499"},{"product_id":"tri-electronics-tb-24gel-gel-tubes-gt-4000-gxl-24","title":"Tri-Electronics TB-24GEL Tubes For GT-4000 \u0026 GXL-24","description":"\u003cp\u003eReplacement TB-24GEL pink gel tubes designed for use with the Tri-Electronics GT-4000 and GXL-24 gold testing instruments. These gel tubes are a consumable component of the testing system, and keeping a supply on hand ensures uninterrupted testing performance. For the longest service life, store in a cool location — heat and age will affect the viscosity of the gel.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement gel tubes compatible with the Tri-Electronics GT-4000 and GXL-24\u003c\/li\u003e\n\u003cli\u003ePink gel formula designed for use in Tri-Electronics electronic gold testing systems\u003c\/li\u003e\n\u003cli\u003eProper storage in a cool environment maximizes tube life and gel consistency\u003c\/li\u003e\n\u003cli\u003eHeat and age can affect viscosity — cool storage is recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eStore TB-24GEL tubes in a cool place to preserve gel viscosity and extend usable life. Heat and prolonged age will degrade performance over time.\u003c\/p\u003e","brand":"Tri-Electronics","offers":[{"title":"Default Title","offer_id":43581612359894,"sku":"156.767","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/tri-electronics-tb-24gel-tubes-for-gt-4000-and-gxl-24-otto-frei.jpg?v=1719957499"},{"product_id":"tri-electronics-gt-gxl-gold-tester-wire-set","title":"Wire Set For GT \u0026 GXL Tri-Electronics Gold Testers","description":"\u003cp\u003eKeep your Tri-Electronics GT and GXL gold testers performing at their best with a genuine replacement wire set. The test wire assembly is the most commonly worn component on these gold testers, and having a spare set on hand ensures minimal downtime during busy testing sessions. Whether wires have become corroded, broken, or simply worn through regular use, swapping in a fresh assembly restores accurate, reliable readings.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for Tri-Electronics GT and GXL gold testers\u003c\/li\u003e\n\u003cli\u003eReplaces the most commonly worn component on these testers\u003c\/li\u003e\n\u003cli\u003eRestores accurate test performance when wires become damaged or corroded\u003c\/li\u003e\n\u003cli\u003eIdeal to keep as a spare for high-volume testing environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Testers\u003c\/th\u003e\n\u003ctd\u003eTri-Electronics GT and GXL Gold Testers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComponent Type\u003c\/th\u003e\n\u003ctd\u003eReplacement Test Wire Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eFor jewelers and appraisers who rely on their gold tester daily, stocking an extra wire set is strongly recommended to avoid interruptions during testing.\u003c\/p\u003e","brand":"Tri-Electronics","offers":[{"title":"Default Title","offer_id":43581613736150,"sku":"156.789","price":20.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/wire-set-for-gt-and-gxl-tri-electronics-gold-testers-otto-frei.jpg?v=1719957496"},{"product_id":"tri-electronics-testing-plate-gt-gxl","title":"Testing Plate For GT \u0026 GXL Gold Testers","description":"\u003cp\u003eKeep your Tri-Electronics GT and GXL gold testers performing at their best with this replacement testing plate. Designed as a direct replacement for the clip board and alligator clip assembly used with GT and GXL series gold testers, this plate ensures a reliable electrical connection during gold testing procedures. Having a quality testing plate in proper working condition is essential for accurate karat verification results.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement testing plate (clip board) for GT and GXL series gold testers\u003c\/li\u003e\n\u003cli\u003eIncludes alligator clip for secure sample contact\u003c\/li\u003e\n\u003cli\u003eDesigned as a direct-fit replacement component\u003c\/li\u003e\n\u003cli\u003eHelps maintain accurate and consistent gold testing results\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Series\u003c\/th\u003e\n\u003ctd\u003eGT and GXL Tri-Electronics Gold Testers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncludes\u003c\/th\u003e\n\u003ctd\u003eTesting plate (clip board) with alligator clip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 replacement testing plate (clip board)\u003c\/li\u003e\n\u003cli\u003e1 alligator clip\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tri-Electronics","offers":[{"title":"Default Title","offer_id":43581614227670,"sku":"156.790","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/testing-plate-for-gt-and-gxl-gold-testers-otto-frei.jpg?v=1719957495"},{"product_id":"premium-gold-test-stone-arkansas-novaculite-usa-2-5x1-5x0-25in","title":"Premium Gold Test Stone-Made in the USA 2-1\/2\"  X 1-1\/2\" X  1\/4\"","description":"\u003cp\u003e\u003cstrong\u003ePremium Gold Test Stone – Made in the USA\u003c\/strong\u003e – 2-1\/2\" × 1-1\/2\" × 1\/4\"\u003c\/p\u003e\u003cp\u003eThis top-quality gold testing stone is an essential tool for precious metal identification. Made from natural Arkansas black novaculite quarried and cut in the USA, it is also commonly referred to as a streak stone or touchstone. Unlike cheap imitations made of glass that quickly stain and degrade, this premium stone is built to deliver reliable, long-lasting performance in professional settings.\u003c\/p\u003e\u003cp\u003eTo use, rub or scratch the item to be tested across the surface of the stone, then apply testing acid (sold separately) over the rubbing. An experienced user can determine the metal type based on the acid's reaction to the streak. For comparative karat testing, rub a known gold testing needle or verified gold sample alongside the test item's streak, then apply acid to both. A similar reaction indicates a similar karat level.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMade from natural Arkansas black novaculite – quarried and cut in the USA\u003c\/li\u003e\n\u003cli\u003ePremium quality construction resists staining and degradation\u003c\/li\u003e\n\u003cli\u003eSuperior alternative to glass-based imitation test stones\u003c\/li\u003e\n\u003cli\u003eAlso known as a streak stone or touchstone\u003c\/li\u003e\n\u003cli\u003eSuitable for comparative karat testing using gold testing needles or known gold samples\u003c\/li\u003e\n\u003cli\u003eCompatible with standard precious metal testing acids (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2-1\/2\" × 1-1\/2\" × 1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eNatural Arkansas black novaculite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariants\u003c\/th\u003e\n\u003ctd\u003eSingle variant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTesting acid is required for use and is sold separately.\u003c\/li\u003e\n\u003cli\u003eAccurate karat determination requires experience interpreting acid reactions.\u003c\/li\u003e\n\u003cli\u003eFor comparative testing, gold testing needles or verified gold samples of known karat are required and are not included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581617766614,"sku":"156.710","price":37.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/premium-gold-test-stone-made-in-the-usa-2-12-x-1-12-x-14-otto-frei.jpg?v=1719957494"},{"product_id":"gold-test-needles-set-10k-14k-18k-999-silver","title":"Gold Test Needles-Set Of Four-10K-14K-18K \u0026 .999 Silver","description":"\u003cp\u003eGold test needles are an essential tool for jewelers performing acid-based metal testing. This set of four needles covers three gold karats — 10K, 14K, and 18K — plus .999 fine silver, giving you a reliable reference for the most commonly tested metal finenesses.\u003c\/p\u003e\n\n\u003cp\u003eTo use, select the appropriate karat needle and rub or scratch it against a test stone. Make a corresponding scratch or rubbing with the item being tested alongside the needle mark. Apply a drop of testing acid across both marks and observe the reactions. If the item reacts identically to the needle mark, the karat or fineness may be the same. If the item dissolves faster than the needle mark, the gold content may be lower; if it dissolves slower, the gold content may be higher. For silver testing, a dedicated silver test acid is required.\u003c\/p\u003e\n\n\u003cp\u003ePlease note: acid-based metal testing is subjective and requires careful observation and practice to master consistently.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet of four test needles for comparative acid testing\u003c\/li\u003e\n  \u003cli\u003eCovers three gold karat standards: 10K, 14K, and 18K\u003c\/li\u003e\n  \u003cli\u003eIncludes one .999 fine silver needle for silver testing\u003c\/li\u003e\n  \u003cli\u003eUsed alongside a test stone and testing acid to compare metal reactions\u003c\/li\u003e\n  \u003cli\u003eEnables visual comparison of acid dissolution rates to estimate karat or fineness\u003c\/li\u003e\n  \u003cli\u003eSilver needle requires a separate silver test acid for accurate results\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eSet Contents\u003c\/th\u003e\n\u003ctd\u003e4 test needles\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eKarat Standards Included\u003c\/th\u003e\n\u003ctd\u003e10K, 14K, 18K gold; .999 silver\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eProp 65\u003c\/th\u003e\n\u003ctd\u003eContains Lead; Contains Lead and Phthalates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAcid-based metal testing is entirely subjective, and results should be interpreted with care.\u003c\/li\u003e\n  \u003cli\u003eMastery of this testing method requires practice and careful observation.\u003c\/li\u003e\n  \u003cli\u003eA test stone and appropriate testing acids are required and are not included.\u003c\/li\u003e\n  \u003cli\u003eSilver testing requires a dedicated silver test acid.\u003c\/li\u003e\n  \u003cli\u003eThis product is subject to California Proposition 65 warnings for Lead and Phthalates.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581618487510,"sku":"156.706","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gold-test-needles-set-of-four-10k-14k-18k-and-999-silver-otto-frei.jpg?v=1719957494"},{"product_id":"gold-test-needles-set-5-10k-12k-14k-18k-22k","title":"Gold Test Needles Set of Five-10K-12K-14K-18K-\u0026 22K","description":"\u003cp\u003e\u003cstrong\u003eGold Test Needles – Set of Five (10K, 12K, 14K, 18K \u0026amp; 22K)\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis professional set of gold test needles includes five needles, each tipped with a different karat of gold, allowing jewelers and metalsmiths to perform comparative acid testing across the most common gold purities. By rubbing each needle against a test stone alongside an unknown gold item, then applying testing acid to both marks, you can observe and compare the acid reactions to estimate the karat of the piece being tested.\u003c\/p\u003e\u003cp\u003eIf the unknown item's mark dissolves at the same rate as the test needle mark, the karat of the item may match that needle. If the item dissolves faster, the gold content may be lower than the needle used; if it dissolves slower, the item may be a higher karat. This method requires careful observation and practice to master, as results are comparative and subjective in nature.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSet of five test needles covering five distinct gold karats\u003c\/li\u003e\n\u003cli\u003eEnables side-by-side acid reaction comparison on a test stone\u003c\/li\u003e\n\u003cli\u003eSupports identification of common gold purities used in jewelry\u003c\/li\u003e\n\u003cli\u003eEssential tool for jewelers, pawnbrokers, and precious metal buyers\u003c\/li\u003e\n\u003cli\u003eResults are comparative — careful observation and practice required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eContents\u003c\/th\u003e\n\u003ctd\u003e5 gold test needles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKarats Included\u003c\/th\u003e\n\u003ctd\u003e10K, 12K, 14K, 18K, 22K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity\u003c\/th\u003e\n\u003ctd\u003e1 set of 5 needles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eComparative acid gold testing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e10K gold test needle\u003c\/li\u003e\n\u003cli\u003e12K gold test needle\u003c\/li\u003e\n\u003cli\u003e14K gold test needle\u003c\/li\u003e\n\u003cli\u003e18K gold test needle\u003c\/li\u003e\n\u003cli\u003e22K gold test needle\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eGold acid testing using test needles is a comparative method and is entirely subjective. Accurate results require a quality test stone, appropriate testing acids (sold separately), and practiced observation. Results should be interpreted carefully and are not a substitute for certified assay testing.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581619077334,"sku":"156.707","price":52.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gold-test-needles-set-of-five-10k-12k-14k-18k-and-22k-otto-frei.jpg?v=1719957494"},{"product_id":"bergeon-6675-4-gold-test-needles-set-4","title":"Bergeon 6675-4 Gold Test Needles Premium Set Of 4 Swiss Made","description":"\u003cp\u003eThe \u003cstrong\u003eBergeon 6675-4 Gold Test Needles\u003c\/strong\u003e are a premium Swiss-made set of four solid gold testing needles designed for professional jewelers and metalsmiths who require accurate, reliable karat testing. What sets these needles apart is that the gold test pieces are \u003cstrong\u003esolid through and through\u003c\/strong\u003e — not plated or surface-coated like lesser alternatives. Each needle carries a small square of solid gold in a specific karat, ensuring consistent, trustworthy results when testing gold alloys with acid or touchstone methods.\u003c\/p\u003e\n\u003cp\u003eThis set is manufactured by Bergeon, a respected name in professional jeweler and watchmaker tooling, and is made in Switzerland to exacting standards.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSolid gold test pieces — not plated or surface-treated\u003c\/li\u003e\n\u003cli\u003eFour needles covering a practical range of yellow gold karats\u003c\/li\u003e\n\u003cli\u003eSwiss-made construction for professional-grade accuracy\u003c\/li\u003e\n\u003cli\u003eDesigned for use with standard acid or touchstone gold testing methods\u003c\/li\u003e\n\u003cli\u003eSuitable for professional jewelers, goldsmiths, and appraisers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eBergeon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e6675-4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSet Quantity\u003c\/th\u003e\n\u003ctd\u003e4 needles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGold Type\u003c\/th\u003e\n\u003ctd\u003eSolid yellow gold test pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eSwiss Made\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 9K Yellow Gold Test Needle\u003c\/li\u003e\n\u003cli\u003e1 × 14K Yellow Gold Test Needle\u003c\/li\u003e\n\u003cli\u003e1 × 18K Yellow Gold Test Needle\u003c\/li\u003e\n\u003cli\u003e1 × 22K Yellow Gold Test Needle\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bergeon","offers":[{"title":"Default Title","offer_id":43581619372246,"sku":"156.720","price":595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/bergeon-6675-4-gold-test-needles-premium-set-of-4-swiss-made-otto-frei.jpg?v=1719957494"},{"product_id":"10k-gold-testing-acid-solution","title":"10KT Gold Testing Solution-Ships Ground Only","description":"\u003cp\u003eThis small plastic bottle contains approximately one ounce of gold testing acid specially formulated for testing 10K gold. Designed for professional jewelers and metalsmiths, this testing solution helps identify karat content through a controlled acid-reaction process on a test stone. \u003cstrong\u003eShips FedEx or UPS Ground only — no air shipping, no international shipping outside the USA.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eApproximately one ounce of 10K gold testing acid in a small plastic bottle\u003c\/li\u003e\n  \u003cli\u003eFormulated specifically for identifying 10K gold content\u003c\/li\u003e\n  \u003cli\u003eUse with a test stone: scratch or rub the metal onto the stone, then apply the smallest possible drop of acid\u003c\/li\u003e\n  \u003cli\u003eObserve the reaction — metal that dissolves indicates lower karat than the acid; metal that remains indicates a match\u003c\/li\u003e\n  \u003cli\u003eFor more accurate results, compare a known karat sample (test needles or verified gold) alongside the unknown sample\u003c\/li\u003e\n  \u003cli\u003eGlass acid bottles with stoppers allow dragging a drop across two scratches simultaneously for side-by-side comparison\u003c\/li\u003e\n  \u003cli\u003eTesting is skill-based — results develop with experience and repetition\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHazardous material:\u003c\/strong\u003e acid will stain skin and is dangerous to eyes — always wear eye protection and rubber gloves\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGold Testing Reaction Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAcid dissolves the metal quickly — metal is likely below the karat indicated on the bottle; try a lower-karat acid\u003c\/li\u003e\n  \u003cli\u003eAcid dissolves the metal slowly — metal may be slightly below the karat of the acid\u003c\/li\u003e\n  \u003cli\u003eMetal remains on the stone — metal is most likely the karat of the acid in the bottle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSilver Testing Reaction Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e0.999 fine silver turns bright red\u003c\/li\u003e\n  \u003cli\u003e0.925 sterling silver turns dark red\u003c\/li\u003e\n  \u003cli\u003e0.800 silver turns brown\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePlatinum Testing Note\u003c\/h3\u003e\n\u003cp\u003ePlatinum should remain on the stone and not dissolve under platinum acid. Some 800-type platinum alloys may dissolve slightly.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eVolume\u003c\/th\u003e\n\u003ctd\u003eApproximately 1 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eContainer\u003c\/th\u003e\n\u003ctd\u003ePlastic bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eKarat Rating\u003c\/th\u003e\n\u003ctd\u003e10K gold\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eHazardous Material\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eShipping Restriction\u003c\/th\u003e\n\u003ctd\u003eFedEx or UPS Ground only — no air service, no international shipping outside the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eShipping restriction:\u003c\/strong\u003e This item ships via FedEx or UPS Ground only. Air shipping services — including FedEx Priority Overnight, FedEx Standard Overnight, FedEx 2nd Day, UPS Next Day Air, UPS 2nd Day Air, UPS 3-Day, Priority Mail, and Global Express Mail — cannot be selected for this item. Orders requesting air service will be shipped ground. This item cannot ship via USPS. \u003cstrong\u003eCannot ship outside the USA.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTesting precious metals with acid is subjective, and skill is developed through experience. Always handle acids with care. Wear eye protection and rubber gloves, and use a cloth for cleanup. Avoid skin contact and never allow acid near the eyes.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581627826390,"sku":"156.800","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/10kt-gold-testing-solution-ships-ground-only-otto-frei.jpg?v=1719957487"},{"product_id":"platinum-testing-acid-solution","title":"Platinum Testing Solution-Ships Ground Only","description":"\u003cp\u003ePlatinum Testing Acid Solution is a specially formulated chemical solution designed to test for the presence of platinum in metal samples. Each small plastic bottle contains approximately one ounce of platinum testing acid. Testing precious metals with acid is an acquired skill — results are subjective and developed through experience and repetition. Always wear eye protection and rubber gloves when handling testing acids, and keep a cloth on hand for cleanup. The acid can stain skin and cause serious injury; handle with extreme care and keep away from eyes.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSpecially formulated platinum testing acid solution\u003c\/li\u003e\n  \u003cli\u003eApproximately one ounce of solution per plastic bottle\u003c\/li\u003e\n  \u003cli\u003ePlatinum samples should remain intact and not dissolve under the platinum acid; note that 800-type platinum may dissolve slightly\u003c\/li\u003e\n  \u003cli\u003eCan also be used for comparison testing of gold and silver when used alongside appropriate karat acids and a test stone\u003c\/li\u003e\n  \u003cli\u003eCompatible testing method: rub metal onto a test stone, apply a small drop of acid, and observe the reaction\u003c\/li\u003e\n  \u003cli\u003eFor best results, compare reaction against a known sample using test needles or confirmed karat pieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTesting Reference Guide\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003ePlatinum:\u003c\/strong\u003e Should stay and not dissolve under platinum acid. Some 800-type platinum may dissolve slightly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGold (for reference when using karat-specific acids):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIf the acid dissolves the metal completely, the karat is lower than the acid rating — try a lower karat acid\u003c\/li\u003e\n  \u003cli\u003eIf the acid dissolves the metal slowly, the karat may be slightly below the acid rating\u003c\/li\u003e\n  \u003cli\u003eIf the metal remains unchanged, it is most likely the karat corresponding to the acid used\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSilver (for reference when using silver testing acid):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e0.999 pure silver turns bright red\u003c\/li\u003e\n  \u003cli\u003e0.925 sterling silver turns dark red\u003c\/li\u003e\n  \u003cli\u003e0.800 silver turns brown\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eSolution Type\u003c\/th\u003e\n\u003ctd\u003ePlatinum testing acid\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eVolume\u003c\/th\u003e\n\u003ctd\u003eApproximately 1 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eContainer\u003c\/th\u003e\n\u003ctd\u003eSmall plastic bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eHazardous Item\u003c\/th\u003e\n\u003ctd\u003eYes — corrosive acid\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eShipping Restriction\u003c\/th\u003e\n\u003ctd\u003eFedEx or UPS Ground only — no air service, no international shipping outside the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShips FedEx or UPS Ground Only.\u003c\/strong\u003e Air shipping services (FedEx Priority or Standard Overnight, FedEx 2nd Day, UPS Next Day, UPS 2nd Day, UPS 3-Day, Priority Mail, Global Express Mail) cannot be used for this item. If an air shipping method is selected at checkout, the order will be rerouted to ground service.\u003c\/li\u003e\n  \u003cli\u003eThis item \u003cstrong\u003ecannot ship via USPS\u003c\/strong\u003e. The US Mail does not accept acids for shipment.\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eCannot ship outside of the USA.\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003eAlways use eye protection and rubber gloves when handling testing acids.\u003c\/li\u003e\n  \u003cli\u003eA test stone is required to perform the scratch test; test needles or known metal samples are recommended for comparison testing.\u003c\/li\u003e\n  \u003cli\u003eTesting results are subjective — accuracy improves with practice and experience.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581629202646,"sku":"156.805","price":4.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/platinum-testing-solution-ships-ground-only-otto-frei.jpg?v=1719957485"},{"product_id":"and-ew-1500i-legal-for-trade-multi-function-scale-1500g","title":"AND EW-1500i Legal For Trade Multi-Function Scale","description":"\u003cp\u003eThe A\u0026amp;D EW-1500i is a compact legal-for-trade multi-function scale with triple-range readability for versatile shop use. It handles precious metals, findings, and larger stones with a 1500 g capacity and smart features such as unit selection, counting, and percent weighing. Legal-for-trade use is subject to your local Weights \u0026amp; Measures authority; counting is not legal for trade.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple-range weighing:\u003c\/strong\u003e 0.1 g (0–300 g), 0.2 g (301–600 g), 0.5 g (601–1500 g).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-unit modes:\u003c\/strong\u003e g, ct, dwt, ozt, oz (AV), lb, Tael, MOM, grain; plus % and counting modes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegal for trade:\u003c\/strong\u003e NTEP-conforming design; final approval by local authority.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e RS-232C for data output; GLP with I.D.\/serial number output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsability:\u003c\/strong\u003e large backlit LCD, sealed key panel, auto power-off.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e overload protection and comparator function (HI\/OK\/LO).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower options:\u003c\/strong\u003e includes 120 V\/60 Hz AC\/DC adapter; optional rechargeable battery pack (OP-09) and optional 240 V adapter (TB:164, special order).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eEW-1500i\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e1500 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReadability (Triple Range)\u003c\/th\u003e\n\u003ctd\u003e0–300 g: 0.1 g | 301–600 g: 0.2 g | 601–1500 g: 0.5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUnits\u003c\/th\u003e\n\u003ctd\u003eg, ct, dwt, ozt, oz (AV), lb, Tael (various), MOM, grain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFunctions\u003c\/th\u003e\n\u003ctd\u003ePercent weighing, counting (not legal for trade), comparator (HI\/OK\/LO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePan Size\u003c\/th\u003e\n\u003ctd\u003e133 mm × 170 mm (approx. 5.2 in × 6.7 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eLarge wide-angle LCD with backlight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eRS-232C; GLP I.D.\/serial output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eFull digital calibration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eAC\/DC 120 V\/60 Hz adapter (included); optional OP-09 rechargeable battery; optional 240 V adapter TB:164 (special order)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLegal for Trade\u003c\/th\u003e\n\u003ctd\u003eNTEP-conforming design; suitability\/installation approval by local authority\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA\u0026amp;D EW-1500i balance\u003c\/li\u003e\n\u003cli\u003eAC\/DC 120 V\/60 Hz adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNTEP evaluations are based on NIST Handbook 44; some states require an NTEP Certificate of Conformance.\u003c\/li\u003e\n\u003cli\u003eFinal approval is determined by your state\/local Weights \u0026amp; Measures official, including installation and suitability.\u003c\/li\u003e\n\u003cli\u003eFor general reference, see the \u003ca rel=\"noopener\" href=\"https:\/\/www.ncwm.com\" target=\"_blank\"\u003eNational Conference on Weights and Measures (NCWM)\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AND Scales","offers":[{"title":"Default Title","offer_id":43581669507286,"sku":"151.045","price":546.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/and-ew-1500i-legal-for-trade-multi-function-scale-otto-frei.jpg?v=1719957465"},{"product_id":"and-fx-300in-legal-for-trade-diamond-scale","title":"A\u0026D FX-300iN Legal for Trade Diamond Scale","description":"\u003cp\u003eThe A\u0026amp;D FX-300iN is a legal-for-trade precision scale built for jewelry and diamond work. With a 320 g (1600 ct) capacity and high readability of 0.001 g and 0.005 ct, it delivers the accuracy professionals require at the bench. The FX-300iN supports a wide range of weighing units—including carats, pennyweights, troy ounces, and more—along with parts counting and percent weighing modes. Functions and active units are user-selectable, so the display shows only what you need. As a legal-for-trade model, the scale is factory calibrated and does not permit user calibration.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLegal for trade:\u003c\/strong\u003e factory calibrated; compliant use subject to local Weights \u0026amp; Measures approval.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh readability:\u003c\/strong\u003e 0.001 g (grams) and 0.005 ct (carats).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-unit weighing:\u003c\/strong\u003e carats, grams, ounces (AV), pounds, troy ounces, pennyweights, momme, grain, and Tael variants.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounting \u0026amp; percent modes:\u003c\/strong\u003e parts counting and percent weighing built in.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnectivity \u0026amp; display:\u003c\/strong\u003e RS-232 output; bright vacuum fluorescent (VFD) display.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBench-ready:\u003c\/strong\u003e includes 120 V AC adapter and 3-3\/8\" tall breeze shield.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5-year warranty\u003c\/strong\u003e from A\u0026amp;D.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eFX-300iN\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e320 g \/ 1600 ct\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eReadability\u003c\/th\u003e\n\u003ctd\u003e0.001 g \/ 0.005 ct\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWeighing Units\u003c\/th\u003e\n\u003ctd\u003ect, g, oz (AV), lb, ozt, dwt, momme, grain, Tael (various)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eFunctions\u003c\/th\u003e\n\u003ctd\u003eParts counting, percent mode; user-selectable enabled units and functions\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePan Size\u003c\/th\u003e\n\u003ctd\u003e⌀ 90 mm (3-1\/2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDimensions (with breeze shield)\u003c\/th\u003e\n\u003ctd\u003e10-3\/8\" L × 7-5\/8\" W × 6-7\/8\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eVacuum fluorescent (VFD)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003ctd\u003eRS-232\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e120 V AC adapter (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLegal for Trade\u003c\/th\u003e\n\u003ctd\u003eYes; final approval and site suitability determined by local authority\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5 years (A\u0026amp;D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eA\u0026amp;D FX-300iN legal-for-trade scale\u003c\/li\u003e\n  \u003cli\u003e120 V AC adapter\u003c\/li\u003e\n  \u003cli\u003e3-3\/8\" tall breeze shield\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eNTEP evaluations are based on NIST Handbook 44. Some states require an NTEP Certificate of Conformance; others accept devices that meet Handbook 44 requirements.\u003c\/li\u003e\n  \u003cli\u003eFinal approval depends on your state or local Weights \u0026amp; Measures official, including evaluation of installation and suitability for use.\u003c\/li\u003e\n  \u003cli\u003eLegal-for-trade scales do not allow user calibration; the FX-300iN is calibrated at the factory.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AND Scales","offers":[{"title":"Default Title","offer_id":43581669703894,"sku":"151.047","price":910.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/aandd-fx-300in-legal-for-trade-diamond-scale-otto-frei.jpg?v=1719957465"},{"product_id":"round-acid-bottles","title":"Round Acid Bottles","description":"\u003cp\u003eRound acid bottles are an essential tool for jewelers and metalsmiths who perform metal testing and acid-based quality verification in the workshop. These bottles are designed to safely store and dispense testing acids used in precious metal identification and karat verification processes.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRound bottle form factor suited for bench and testing station use\u003c\/li\u003e\n\u003cli\u003eDesigned for safe storage and controlled dispensing of testing acids\u003c\/li\u003e\n\u003cli\u003ePractical consumable supply for professional jewelers and metalsmiths performing metal testing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eRound Acid Bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eMetal testing and acid storage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581669867734,"sku":"115.103","price":2.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/round-acid-bottles-otto-frei.jpg?v=1719957465"},{"product_id":"premium-gold-test-stone-thick-arkansas-novaculite-usa","title":"Premium Gold Test Stone-Thick-Made in the USA- 2-1\/2\" X 1-1\/2\" X 1\/2\"","description":"\u003cp\u003eA professional-grade gold testing stone for precious metal identification, this \u003cstrong\u003ethick touchstone\u003c\/strong\u003e is made in the USA from natural Arkansas black novaculite — a premium material quarried and cut domestically. At 2-1\/2\" × 1-1\/2\" × 1\/2\", the generous thickness provides a durable, long-lasting testing surface suited for daily bench use.\u003c\/p\u003e\u003cp\u003eAlso referred to as streak stones or touchstones, this tool is a trusted standard for jewelers performing acid-based precious metal testing. Beware of cheap imitations made of glass, which stain quickly and degrade with repeated use. Natural novaculite provides a consistent, stable surface that holds up to professional demands.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMade in the USA from natural Arkansas black novaculite\u003c\/li\u003e\n\u003cli\u003eThick profile (1\/2\") for extended service life and durability\u003c\/li\u003e\n\u003cli\u003eSmooth, consistent surface ideal for precise streak testing\u003c\/li\u003e\n\u003cli\u003eResistant to staining and degradation — unlike glass imitations\u003c\/li\u003e\n\u003cli\u003eCompatible with acid-based precious metal testing methods\u003c\/li\u003e\n\u003cli\u003eSuitable for comparative karat testing using reference needles or known gold samples\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eRub or scratch the item to be tested across the stone surface to leave a metallic streak.\u003c\/li\u003e\n\u003cli\u003eApply testing acid (sold separately) across the streak.\u003c\/li\u003e\n\u003cli\u003eObserve the acid reaction — an experienced user can determine metal type based on how the streak responds.\u003c\/li\u003e\n\u003cli\u003eFor comparative karat testing, rub a reference needle or known gold sample beside the test streak, apply acid to both, and compare reactions. A similar reaction indicates similar karat content.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e2-1\/2\" × 1-1\/2\" × 1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eNatural Arkansas black novaculite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTesting Acid\u003c\/th\u003e\n\u003ctd\u003eSold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eTesting acid and gold testing needles are \u003cstrong\u003enot included\u003c\/strong\u003e and must be purchased separately. Accurate metal identification via acid testing requires experience and familiarity with acid reaction results. For comparative karat testing, use reference needles or gold samples of verified karat content.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581741957334,"sku":"156.710.5","price":41.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/premium-gold-test-stone-thick-made-in-the-usa-2-12-x-1-12-x-12-otto-frei.jpg?v=1719957418"},{"product_id":"gold-test-stone-arkansas-novaculite-usa-3x1-5-8x1-4","title":"Premium Gold Test Stone-Made in the USA 3\" x 1-5\/8\" x 1\/4\"","description":"\u003cp\u003eA professional-grade gold testing stone made in the USA from natural Arkansas black novaculite, quarried and cut domestically. Used by jewelers and metalsmiths to test precious metals, this stone—also known as a streak stone or touchstone—provides a reliable surface for acid-based karat testing. Beware of cheap imitations made of glass, which stain and degrade quickly under repeated use.\u003c\/p\u003e\u003cp\u003eTo test a metal item, rub or scratch it across the stone's surface, then apply testing acid (sold separately) to the rubbing. An experienced user can determine the metal type based on the acid's reaction. For comparative karat testing, rub a known gold testing needle or verified gold sample alongside the test item's rubbing, apply acid to both, and compare the reactions—a similar reaction indicates similar karat content.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMade in the USA from natural Arkansas black novaculite\u003c\/li\u003e\n\u003cli\u003eQuarried and cut domestically for consistent quality\u003c\/li\u003e\n\u003cli\u003eSuitable for acid-based precious metal testing\u003c\/li\u003e\n\u003cli\u003eAlso known as a streak stone or touchstone\u003c\/li\u003e\n\u003cli\u003eSupports both reaction-based and comparative karat testing methods\u003c\/li\u003e\n\u003cli\u003eResists staining and degradation—unlike glass imitations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e3\" x 1-5\/8\" x 1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eNatural Arkansas black novaculite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTesting acid is sold separately and is required for acid-based testing.\u003c\/li\u003e\n\u003cli\u003eGold testing needles or verified gold samples are required for comparative karat testing.\u003c\/li\u003e\n\u003cli\u003eAccurate results depend on the experience of the user performing the test.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581742121174,"sku":"156.712.5","price":45.65,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/premium-gold-test-stone-made-in-the-usa-3-x-1-58-x-14-otto-frei.jpg?v=1719957418"},{"product_id":"gold-test-needles-10k-14k-18k","title":"Gold Test Needles-Set Of Three-10K-14K-18K","description":"\u003cp\u003eGold test needles are an essential tool for jewelers performing acid-based karat testing. This set of three needles covers the most commonly encountered gold karats in jewelry: 10K, 14K, and 18K. Use these needles as reference standards when comparing acid reactions on a test stone to determine the karat of an unknown gold item.\u003c\/p\u003e\n\n\u003cp\u003eTo use, select the appropriate karat needle and rub or scratch it against a test stone. Make a second rubbing or scratch with the item to be tested directly alongside the needle mark. Apply a drop of testing acid across both marks and observe how each reacts. If both marks react identically, the item being tested likely matches the karat of the needle used. If the test item dissolves faster, it may be a lower karat; if it dissolves more slowly, it may be a higher karat.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Acid-based gold testing is subjective by nature and requires careful observation and consistent practice to produce reliable results.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet of three gold test needles covering 10K, 14K, and 18K\u003c\/li\u003e\n  \u003cli\u003eDesigned for use with acid testing on a test stone\u003c\/li\u003e\n  \u003cli\u003eProvides side-by-side comparison marks for accurate karat evaluation\u003c\/li\u003e\n  \u003cli\u003eUseful for identifying whether an unknown item is a higher or lower karat than the reference needle\u003c\/li\u003e\n  \u003cli\u003eSuitable for professional jewelers, appraisers, and metalsmiths\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eContents\u003c\/th\u003e\n\u003ctd\u003e3 test needles\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eKarats Included\u003c\/th\u003e\n\u003ctd\u003e10K, 14K, 18K\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eProp 65\u003c\/th\u003e\n\u003ctd\u003eContains Lead and Phthalates — California Prop 65 warning applies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e10K gold test needle\u003c\/li\u003e\n  \u003cli\u003e14K gold test needle\u003c\/li\u003e\n  \u003cli\u003e18K gold test needle\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581743464662,"sku":"156.704","price":60.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gold-test-needles-set-of-three-10k-14k-18k-otto-frei.jpg?v=1719957416"},{"product_id":"gold-test-needles-set-5-10k-14k-18k-22k-999-silver","title":"Gold Test Needles-Set Of Five-10K-14K-18K-22K \u0026 .999 Silver","description":"\u003cp\u003eGold test needles are an essential tool for jewelers and precious metal buyers who need to assess the karat or fineness of gold and silver items using acid testing methods. This set of five needles covers the most commonly encountered gold karats and a fine silver standard, giving you reliable reference marks for side-by-side acid comparisons.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet of five test needles covering four gold karats and one silver fineness\u003c\/li\u003e\n  \u003cli\u003eIncludes 10K, 14K, 18K, and 22K gold needles, plus a .999 fine silver needle\u003c\/li\u003e\n  \u003cli\u003eUsed alongside a touchstone and appropriate testing acids for comparative acid reaction testing\u003c\/li\u003e\n  \u003cli\u003eRub or scratch each needle against a test stone, place a mark from the unknown item beside it, apply testing acid, and compare reactions\u003c\/li\u003e\n  \u003cli\u003eIf the unknown item dissolves faster than the reference needle mark, its gold content may be lower karat; if it dissolves slower, it may be higher karat\u003c\/li\u003e\n  \u003cli\u003eSilver needle requires a silver-specific test acid for accurate results\u003c\/li\u003e\n  \u003cli\u003eNote: acid testing with needles is subjective and requires careful observation and practice to master\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eContents\u003c\/th\u003e\n\u003ctd\u003e5 test needles\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eKarats \/ Fineness Included\u003c\/th\u003e\n\u003ctd\u003e10K, 14K, 18K, 22K gold; .999 silver\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eTesting Method\u003c\/th\u003e\n\u003ctd\u003eAcid reaction comparison on touchstone\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003e1 (single set, no selectable options)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e10K gold test needle\u003c\/li\u003e\n  \u003cli\u003e14K gold test needle\u003c\/li\u003e\n  \u003cli\u003e18K gold test needle\u003c\/li\u003e\n  \u003cli\u003e22K gold test needle\u003c\/li\u003e\n  \u003cli\u003e.999 fine silver test needle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eAcid testing with test needles is an entirely subjective method and requires careful observation and practice to master. A separate silver test acid is required when testing against the .999 silver needle. This product is subject to California Proposition 65 warnings for Lead and Phthalates.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581743956182,"sku":"156.708","price":108.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gold-test-needles-set-of-five-10k-14k-18k-22k-and-999-silver-otto-frei.jpg?v=1719957416"},{"product_id":"gold-test-needles-set-8k-10k-12k-14k-18k","title":"Gold Test Needles-Set Of Five-8K-10K-12K-14K \u0026 18K","description":"\u003cp\u003eGold test needles are an essential tool for jewelers and precious metal buyers who need to verify the karat purity of gold items using acid testing. This set includes five needles spanning the most commonly encountered gold karats — 8K, 10K, 12K, 14K, and 18K — giving you a comprehensive reference range for comparative acid testing.\u003c\/p\u003e\n\n\u003cp\u003eTo use, select the appropriate karat needle and rub or scratch it against a test stone. Make a second mark on the stone with the item being tested, placing both marks side by side. Apply a drop of testing acid across both marks and observe how each reacts. If the item being tested reacts identically to the test needle mark, the karat of the two pieces may be the same. If the item dissolves more quickly than the test needle mark, the gold content may be lower than the selected needle's karat. If the item dissolves more slowly, the gold content may be higher. Please note that acid testing of this type is entirely subjective and requires careful observation and practice to master.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet of five gold test needles covering 8K, 10K, 12K, 14K, and 18K\u003c\/li\u003e\n  \u003cli\u003eUsed for comparative acid testing on a test stone\u003c\/li\u003e\n  \u003cli\u003eAllows side-by-side comparison of acid reactions between known and unknown gold items\u003c\/li\u003e\n  \u003cli\u003eSpans a wide karat range to support identification across common gold purities\u003c\/li\u003e\n  \u003cli\u003eA practical reference tool for jewelers, appraisers, and precious metal buyers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eSet Quantity\u003c\/th\u003e\n\u003ctd\u003e5 needles\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eKarats Included\u003c\/th\u003e\n\u003ctd\u003e8K, 10K, 12K, 14K, 18K\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eTesting Method\u003c\/th\u003e\n\u003ctd\u003eComparative acid testing on a test stone\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCalifornia Prop 65\u003c\/th\u003e\n\u003ctd\u003eWarning: Contains lead and phthalates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e8K gold test needle\u003c\/li\u003e\n  \u003cli\u003e10K gold test needle\u003c\/li\u003e\n  \u003cli\u003e12K gold test needle\u003c\/li\u003e\n  \u003cli\u003e14K gold test needle\u003c\/li\u003e\n  \u003cli\u003e18K gold test needle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eAcid testing with test needles is a subjective method, and results depend on careful observation and practiced technique. Testing acid and test stone are not included and must be obtained separately. This product contains lead and\/or phthalates — see California Proposition 65 for details.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581745529046,"sku":"156.709","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gold-test-needles-set-of-five-8k-10k-12k-14k-and-18k-otto-frei.jpg?v=1719957417"},{"product_id":"large-natural-gold-test-stone-6x4","title":"Large Gold Test Stone Natural Stone - 6\" x 4\"","description":"\u003cp\u003eThe \u003cstrong\u003eLarge Gold Test Stone\u003c\/strong\u003e from Eurotool is a \u003cstrong\u003enatural stone\u003c\/strong\u003e cut to a generous \u003cstrong\u003e6\" x 4\"\u003c\/strong\u003e size, ideal for professional gold testing in a jeweler's bench or assay station. Gold test stones—also known as touchstones—are used to assess the karat or purity of gold alloys by observing the streak left when metal is rubbed across the stone's fine-grained surface. The larger format of this stone provides ample working area, allowing multiple test streaks to be compared side by side without crowding.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNatural stone construction for reliable, professional-grade gold testing\u003c\/li\u003e\n\u003cli\u003eGenerous 6\" x 4\" surface provides ample room for multiple simultaneous streak comparisons\u003c\/li\u003e\n\u003cli\u003eFine-grained surface texture delivers consistent, readable test results\u003c\/li\u003e\n\u003cli\u003eSuitable for use with gold testing acids and test needles\u003c\/li\u003e\n\u003cli\u003eA staple tool for jewelers, assayers, and precious metal buyers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eNatural stone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e6\" x 4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eEurotool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Eurotool","offers":[{"title":"Default Title","offer_id":43581746217174,"sku":"156.714","price":26.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/large-gold-test-stone-natural-stone-6-x-4-otto-frei.jpg?v=1719957416"},{"product_id":"and-ac-adaptor-120v-60hz","title":"Optional AND AC Adaptor 120V\/60C","description":"\u003cp\u003eKeep your A\u0026amp;D scale powered continuously with the optional A\u0026amp;D AC Adaptor rated at 120V\/60Hz. Designed for use with compatible A\u0026amp;D scales, this adaptor allows bench jewelers, metalsmiths, and watchmakers to run their precision scale from a standard wall outlet—eliminating the need for battery replacements during extended weighing sessions.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRated for 120V\/60Hz standard North American outlets\u003c\/li\u003e\n\u003cli\u003eEnables continuous AC-powered operation of compatible A\u0026amp;D scales\u003c\/li\u003e\n\u003cli\u003eReduces downtime associated with battery changes during active bench work\u003c\/li\u003e\n\u003cli\u003eOptional accessory—sold separately from the scale unit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Voltage\u003c\/th\u003e\n\u003ctd\u003e120V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003ctd\u003e60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003ctd\u003eA\u0026amp;D scales (see Notes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eThis AC adaptor is an optional accessory intended for use with A\u0026amp;D brand scales. Verify compatibility with your specific A\u0026amp;D scale model before ordering. Not all A\u0026amp;D scale models accept an external AC adaptor.\u003c\/p\u003e","brand":"AND Scales","offers":[{"title":"Default Title","offer_id":43581747724502,"sku":"151.065","price":72.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/optional-and-ac-adaptor-120v60c-otto-frei.jpg?v=1719957413"},{"product_id":"presidium-pmut-iii-universal-ac-adaptor","title":"Optional Presidium Multi Tester PMUT III 100\/240V Universal","description":"\u003cp\u003eThe \u003cstrong\u003ePresidium Multi Tester PMUT III 100\/240V Universal AC Adaptor\u003c\/strong\u003e is an optional power accessory designed specifically for the Presidium Multi Tester PMUT III. The PMUT III ordinarily runs on 3 AAA batteries with up to 2½ hours of continuous use per fresh set. This adaptor eliminates battery dependency by allowing you to power the tester directly from a standard North American 110V outlet — or, when used with a suitable plug adaptor, from a 240V outlet as well.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e This adaptor is \u003cem\u003enot compatible\u003c\/em\u003e with earlier Presidium Multi-Tester models. If you own a PMUT or PMUT II, you will need adaptor \u003cstrong\u003e156.753\u003c\/strong\u003e instead.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOptional AC power source for the Presidium Multi Tester PMUT III\u003c\/li\u003e\n\u003cli\u003eUniversal voltage support — compatible with 100V and 240V outlets\u003c\/li\u003e\n\u003cli\u003ePowers the PMUT III via a standard North American 110V outlet\u003c\/li\u003e\n\u003cli\u003eCompatible with 240V outlets when used with an appropriate plug adaptor\u003c\/li\u003e\n\u003cli\u003eEliminates reliance on AAA batteries during extended bench use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot compatible\u003c\/strong\u003e with PMUT or PMUT II models — those require adaptor 156.753\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Tester\u003c\/th\u003e\n\u003ctd\u003ePresidium Multi Tester PMUT III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Voltage\u003c\/th\u003e\n\u003ctd\u003e100V \/ 240V AC (universal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard Outlet Compatibility\u003c\/th\u003e\n\u003ctd\u003eNorth American 110V; 240V with suitable plug adaptor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncompatible Models\u003c\/th\u003e\n\u003ctd\u003ePMUT and PMUT II (use adaptor 156.753)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThis adaptor \u003cstrong\u003ewill not work\u003c\/strong\u003e with earlier-generation Presidium Multi-Testers. If you have a PMUT or PMUT II model, order adaptor \u003cstrong\u003e156.753\u003c\/strong\u003e to ensure compatibility.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581760241878,"sku":"156.753NEW","price":10.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/156.753NEW1_thumb_ab89c072-a7ad-4cab-86ce-2f207d892fa2.jpg?v=1778603512"},{"product_id":"gemoro-auracle-gold-tester-ac-adaptor","title":"GemOro AuRACLE Gold Tester AC Adaptor 110V\/240V","description":"\u003cp\u003eKeep your GemOro AuRACLE Gold Tester running without interruption during busy testing sessions. This optional AC adaptor is designed specifically for the GemOro 2001 AuRACLE AGT-1 gold tester, providing a reliable wired power source in place of the standard 9V battery. The dual-voltage design supports both 110V and 240V operation, making it compatible with standard North American outlets as well as international 240V outlets when used with an appropriate plug adaptor.\u003c\/p\u003e\n\n\u003cp\u003eThe AuRACLE tester is battery-powered by default, offering up to 4–6 hours of continuous use on a fresh 9V battery. For high-volume environments such as jewelry counters, pawn shops, or trade shows where extended use is routine, this AC adaptor eliminates the need to monitor battery levels or interrupt workflow for replacements.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for the GemOro 2001 AuRACLE AGT-1 gold tester\u003c\/li\u003e\n\u003cli\u003eDual-voltage support: 110V and 240V operation\u003c\/li\u003e\n\u003cli\u003ePlugs into a standard North American 110V outlet\u003c\/li\u003e\n\u003cli\u003eCompatible with 240V outlets when used with a suitable plug adaptor\u003c\/li\u003e\n\u003cli\u003eReplaces 9V battery power for uninterrupted continuous use\u003c\/li\u003e\n\u003cli\u003eIdeal for high-volume or extended testing sessions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Instrument\u003c\/th\u003e\n\u003ctd\u003eGemOro 2001 AuRACLE Gold Tester AGT-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInput Voltage\u003c\/th\u003e\n\u003ctd\u003e110V \/ 240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutlet Type (Primary)\u003c\/th\u003e\n\u003ctd\u003eStandard North American 110V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInternational Use\u003c\/th\u003e\n\u003ctd\u003e240V compatible with suitable plug adaptor (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReplaces\u003c\/th\u003e\n\u003ctd\u003e9V battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis is an optional accessory—it does not ship with the AuRACLE tester.\u003c\/li\u003e\n\u003cli\u003eA suitable plug adaptor is required for 240V international outlet use and is not included.\u003c\/li\u003e\n\u003cli\u003eThe GemOro AuRACLE AGT-1 tester operates up to 4–6 hours continuously on a fresh 9V battery when the AC adaptor is not in use.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43581761159382,"sku":"156.799ADP","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-auracle-gold-tester-ac-adaptor-110v240v-otto-frei.jpg?v=1719957411"},{"product_id":"auracle-18k-yellow-plumb-gold-calibration-disc","title":"AuRACLE 18k Yellow Plumb Calibration Round","description":"\u003cp\u003eThe AuRACLE 18K Yellow Plumb Gold Calibration Round is a precision calibration disc designed specifically for use with the AuRACLE gold tester. Proper calibration is essential for accurate karat readings, and GemOro recommends using an 18K yellow plumb gold sample as the calibration standard. This disc meets that specification exactly, ensuring your AuRACLE tester performs to its full accuracy potential.\u003c\/p\u003e\u003cp\u003e\u003cem\u003ePlumb gold\u003c\/em\u003e refers to gold that is guaranteed to be no less than its marked karat value — in this case, no less than .750 fine gold (18K). This standard has been the benchmark for 18K gold in the United States for nearly 40 years. Prior to the introduction of plumb gold standards, jewelry marked 18K in the United States could legally contain as little as 17.5K gold. Using a verified plumb gold sample eliminates that ambiguity and ensures your calibration baseline is accurate.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePurpose-made calibration disc for the AuRACLE gold tester\u003c\/li\u003e\n\u003cli\u003e18K yellow plumb gold — guaranteed no less than .750 fine gold\u003c\/li\u003e\n\u003cli\u003eMeets GemOro's recommended calibration standard for the AuRACLE system\u003c\/li\u003e\n\u003cli\u003eEnsures accurate karat testing results when used for regular calibration\u003c\/li\u003e\n\u003cli\u003eConforms to the U.S. plumb gold standard established for 18K jewelry\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eKarat\u003c\/th\u003e\n\u003ctd\u003e18K (0.750 fine gold)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMetal Color\u003c\/th\u003e\n\u003ctd\u003eYellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGold Type\u003c\/th\u003e\n\u003ctd\u003ePlumb gold — guaranteed minimum fineness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eForm\u003c\/th\u003e\n\u003ctd\u003eRound disc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIntended Use\u003c\/th\u003e\n\u003ctd\u003eCalibration for AuRACLE gold tester\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eGemOro recommends calibrating your AuRACLE tester with an 18K yellow plumb gold sample for best accuracy. Any piece of 18K yellow gold you are certain is .750 fine will function as a calibration reference; this disc provides a dedicated, reliable standard for that purpose.\u003c\/p\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43581811523798,"sku":"156.799CAL","price":55.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/auracle-14k-yellow-plumb-calibration-round-otto-frei.jpg?v=1719957394"},{"product_id":"simplicity-gc-salts-5-lbs","title":"Simplicity GC Salts 5 Lbs.","description":"\u003cp\u003e\u003cstrong\u003eSimplicity GC Salts\u003c\/strong\u003e is a professional-grade salt compound designed for use in gold and silver testing and electroplating processes. 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An innovative flip-up draft shield, bright blue backlit LCD, and durable ULTRAGrip rubberized finish make it as practical in the field as it is at the bench.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-unit weighing:\u003c\/strong\u003e Measures in carats, grams, pennyweights (DWT), ounces (AV), and troy ounces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eParts counting mode:\u003c\/strong\u003e Easily count small components such as findings or beads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTouch control interface:\u003c\/strong\u003e Four-button panel (On\/Off, Tare, Mode, Pieces) for intuitive operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlip-up draft shield:\u003c\/strong\u003e Low-profile tinted cover expands to accommodate larger stones or parcels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBright blue backlit LCD:\u003c\/strong\u003e Clear, easy-to-read digital display in any lighting condition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushbutton calibration and tare:\u003c\/strong\u003e Simplifies setup and ensures consistent accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable ULTRAGrip rubberized finish:\u003c\/strong\u003e Improves handling and reduces slippage during use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-off and low-battery indicators:\u003c\/strong\u003e Extend battery life and maintain reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e250 carats \/ 50 grams \/ 32 dwt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReadability\u003c\/th\u003e\n\u003ctd\u003e0.005 ct \/ 0.001 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eBlue backlit LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Source\u003c\/th\u003e\n\u003ctd\u003e4 × AA alkaline batteries or AC\/DC adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eDigital, pushbutton\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5-year limited replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGemOro Platinum PCT251 Scale\u003c\/li\u003e\n\u003cli\u003eLeatherette protective carrying case with compartments\u003c\/li\u003e\n\u003cli\u003eTwo calibration weights\u003c\/li\u003e\n\u003cli\u003eDiamond scoop or tray\u003c\/li\u003e\n\u003cli\u003eSwiss-style diamond tweezers\u003c\/li\u003e\n\u003cli\u003eUniversal AC\/DC adapter (100–240V, 50\/60Hz)\u003c\/li\u003e\n\u003cli\u003e4 × AA batteries\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eEven large-capacity carat scales have weight limits. Avoid overloading to maintain accuracy and prevent damage to the weighing mechanism.\u003c\/p\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43581833347286,"sku":"150.119","price":109.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/150.119NEW_thumb_83738241-d125-4708-823e-81d69fd88ff7.jpg?v=1732749005"},{"product_id":"gemoro-platinum-pct-101-100ct-carat-scale","title":"GemOro Platinum PCT-101 100 Carat Diamond Scale","description":"\u003cp\u003eThe \u003cstrong\u003eGemOro Platinum PCT-101\u003c\/strong\u003e is a portable, multi-function carat scale built for jewelers and gemologists who demand dependable accuracy at the bench or in the field. 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The 100 ct model supports approximately \u003cstrong\u003e12 dwt (ozt)\u003c\/strong\u003e — avoid overloading to preserve accuracy and prevent damage.\u003c\/p\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43581834428630,"sku":"150.121","price":109.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-platinum-pct-101-100-carat-diamond-scale-otto-frei.jpg?v=1719957384"},{"product_id":"ohaus-ac-adapter-yj152-carat-scale","title":"AC Adapter For Ohaus Carat Scale 151.112","description":"\u003cp\u003eKeep your Ohaus YJ152 carat scale powered and ready for precise gem weighing with this dedicated AC adapter. 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With its ergonomic design, LED illumination, and advanced testing modes, this premium tester ensures reliable, accurate results for jewelers, gemologists, and appraisers.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAccurately distinguishes diamonds, moissanite, sapphire, and simulants\u003c\/li\u003e\n\u003cli\u003eEnhanced moissanite testing technology for low conductivity stones\u003c\/li\u003e\n\u003cli\u003eErgonomic grip with finger pads to prevent operator error\u003c\/li\u003e\n\u003cli\u003eLED stone illumination with UV fluorescence detection\u003c\/li\u003e\n\u003cli\u003eChoice of spoken results (multiple languages) or ringtone alerts\u003c\/li\u003e\n\u003cli\u003eGlowing probe tip and light bar with color-coded identification:\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreen\u003c\/strong\u003e = Diamond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue\u003c\/strong\u003e = Moissanite\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePink\u003c\/strong\u003e = Sapphire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed\u003c\/strong\u003e = Metal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eCan identify genuine sapphire watch crystals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay \/ Indicators\u003c\/th\u003e\n\u003ctd\u003eLED illumination, glowing probe tip, multilingual voice or ringtone alerts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery\u003c\/th\u003e\n\u003ctd\u003eRechargeable NiMH batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCharging\u003c\/th\u003e\n\u003ctd\u003eMicro USB cord with low-profile UltraDock 3 stand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e10-year probe tip warranty; lifetime limited replacement warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGemOro Testerossa multi-tester\u003c\/li\u003e\n\u003cli\u003eLow-profile UltraDock 3 charging stand\u003c\/li\u003e\n\u003cli\u003eAdjustable test stone magnifier attachment\u003c\/li\u003e\n\u003cli\u003eMicro USB cord and charging plug\u003c\/li\u003e\n\u003cli\u003eRechargeable NiMH batteries\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43582212997334,"sku":"156.740","price":314.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/gemoro-testerossa-diamond-multi-tester-otto-frei.jpg?v=1719957186"},{"product_id":"presidium-pgi-gem-indicator-colored-stone-tester-31-gems","title":"Presidium PGI Gem Indicator","description":"\u003cp\u003eThe \u003cstrong\u003ePresidium Gem Indicator (PGI)\u003c\/strong\u003e is the only handheld tester specifically designed for colored gemstones. Using advanced thermal conductivity technology, it can identify up to 31 different gem types and includes a color input function with 12 common gemstone colors for even greater accuracy. A clear digital LED screen ensures easy-to-read results, while the patented changeable probe tip delivers reliable, long-term performance.\u003c\/p\u003e\u003cp\u003eThe PGI is a convenient, handheld upgrade from the popular Presidium PGT\/CSE Gem Tester (SKU: 156.750), combining proven accuracy with enhanced portability.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDifferentiates diamonds from other colored gemstones\u003c\/li\u003e\n\u003cli\u003eIdentifies up to 31 gemstone types\u003c\/li\u003e\n\u003cli\u003eColor input function with 12 color choices for improved precision\u003c\/li\u003e\n\u003cli\u003eThinner 0.45mm retractable probe tests stones as small as 0.2 ct\u003c\/li\u003e\n\u003cli\u003eChangeable probe tip for extended service life\u003c\/li\u003e\n\u003cli\u003eBuilt-in metal alert buzzer\u003c\/li\u003e\n\u003cli\u003eLow battery indicator\u003c\/li\u003e\n\u003cli\u003eInternal gemstone database with color references\u003c\/li\u003e\n\u003cli\u003eUSB connection for firmware and software updates\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTesting Range\u003c\/th\u003e\n\u003ctd\u003eUp to 31 colored gemstones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProbe\u003c\/th\u003e\n\u003ctd\u003e0.45mm retractable thermoelectric probe, changeable tip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum Stone Size\u003c\/th\u003e\n\u003ctd\u003e0.2 ct and above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eDigital LED\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e3 x AAA batteries (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnectivity\u003c\/th\u003e\n\u003ctd\u003eUSB connection for software updates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Ambient Temp\u003c\/th\u003e\n\u003ctd\u003e73–80°F (23–27°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Presidium","offers":[{"title":"Default Title","offer_id":43582261035222,"sku":"156.750PGI","price":368.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/presidium-pgi-gem-indicator-otto-frei-1.jpg?v=1719957145"},{"product_id":"aqua-regia-e-scrap-basket","title":"Aqua Regia E-Scrap Basket Only","description":"\u003cp\u003eThe Aqua Regia Gold \u0026amp; Platinum Refining System is widely used to refine precious metals recovered from e-scrap such as circuit boards and chips. Because the volume of non-metallic materials — plastics, ceramics, and similar substrates — is high relative to the precious metal content, significantly more acid is required to cover the material than is needed to dissolve the metal itself. The most economical approach is to dissolve the metal first, remove the non-metallic solids, and then load fresh e-scrap to continue the process. Having a second E-Scrap Basket on hand makes this workflow faster and more efficient, allowing you to reload without interruption.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for use with the Aqua Regia Gold \u0026amp; Platinum Refining System\u003c\/li\u003e\n\u003cli\u003eEnables a continuous refining workflow — remove non-metals and reload fresh e-scrap without downtime\u003c\/li\u003e\n\u003cli\u003eHelps maximize acid efficiency by separating dissolved metals from solid non-metallic waste\u003c\/li\u003e\n\u003cli\u003eIdeal for refining precious metals from circuit boards, chips, and similar e-scrap sources\u003c\/li\u003e\n\u003cli\u003eA practical spare or replacement basket for active refining operations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eThis listing is for the E-Scrap Basket only — the Aqua Regia Refining System is sold separately.\u003c\/li\u003e\n\u003cli\u003eIntended for use with the compatible Aqua Regia refining vessel; verify fit with your existing system before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43583371575510,"sku":"163.601","price":75.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/aqua-regia-e-scrap-basket-only-otto-frei.jpg?v=1719956679"},{"product_id":"aqua-regia-basket-pouch-gold-platinum-refining","title":"Aqua Regia Basket Pouch","description":"\u003cp\u003eThe Aqua Regia Basket Pouch is a key accessory for the Aqua Regia Gold \u0026amp; Platinum Refining System, designed to improve efficiency when processing e-scrap such as circuit boards and chips. When refining precious metals from electronic scrap, the volume of non-metal materials — plastics, ceramics, and similar substrates — is significantly greater than the precious metal content itself. This disproportion means that far more acid is required to submerge the material than is actually needed to dissolve the metal.\u003c\/p\u003e\u003cp\u003eThe basket pouch addresses this challenge by allowing the non-metal materials to be removed from the acid bath after the metal has dissolved, so that fresh e-scrap can be added without wasting acid or reducing efficiency. This approach makes the refining process considerably more economical by maximizing acid utilization and throughput when working with high-volume e-scrap material.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for use with the Aqua Regia Gold \u0026amp; Platinum Refining System\u003c\/li\u003e\n\u003cli\u003eEnables removal of non-metal materials (plastics, ceramics, etc.) after precious metal dissolution\u003c\/li\u003e\n\u003cli\u003eAllows additional e-scrap to be loaded without discarding acid, improving economy\u003c\/li\u003e\n\u003cli\u003eWell-suited for processing e-scrap sources such as circuit boards and chips\u003c\/li\u003e\n\u003cli\u003eSupports a more efficient, higher-throughput refining workflow\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eIntended for use as part of the Aqua Regia Gold \u0026amp; Platinum Refining System — confirm compatibility with your existing setup before ordering.\u003c\/li\u003e\n\u003cli\u003eAqua regia is a highly corrosive acid mixture; always follow appropriate safety protocols when handling.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43583377834198,"sku":"163.601BP","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/aqua-regia-basket-pouch-otto-frei.jpg?v=1719956678"},{"product_id":"mettler-jl6001ge-a-legal-for-trade-6200g-multi-function-scale","title":"Mettler JL6001GE\/A Legal for Trade 6200 Grams x 0.1 Gram Multi-Function Scale","description":"\u003cp\u003eThe Mettler JL6001GE\/A is a legal-for-trade multi-function scale trusted by jewelers worldwide as a benchmark for precision and accuracy. With a 6,200-gram capacity and 0.1-gram readability, this scale is built exclusively for the jewelry industry and handles the full range of weighing units professionals rely on daily: grams, carats, kilograms, milligrams, pounds, troy ounces, avoirdupois ounces, grain, and DWT (pennyweight).\u003c\/p\u003e\u003cp\u003eThe scale can be programmed to quickly toggle between any two weighing modes — for example, grams and pennyweights or grams and troy ounces — or used straight out of the box to cycle through all available modes. A 6,200-gram capacity equates to 199 troy ounces or 3,980 pennyweights, making this an ideal scale for high-volume precious metal transactions.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNote: Although this scale weighs in carats, its 0.50 ct accuracy does not qualify it as a diamond scale.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003eThe GE\/A designation indicates this version is configured for the American market. It meets the requirements for use in the USA as a Class II weighing device as defined by NIST Handbook 44: Specifications, Tolerances and Other Technical Requirements for Weighing and Measuring Devices.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6,200-gram maximum capacity — equivalent to 199 troy ounces or 3,980 pennyweights\u003c\/li\u003e\n\u003cli\u003e0.1-gram readability (0.05 pennyweight readability)\u003c\/li\u003e\n\u003cli\u003eWeighs in grams, carats, kilograms, milligrams, pounds, troy ounces, avoirdupois ounces, grain, and DWT\u003c\/li\u003e\n\u003cli\u003eProgrammable to toggle between any two weighing modes or cycle through all modes\u003c\/li\u003e\n\u003cli\u003eLegal for trade in the USA — meets NIST Handbook 44 Class II requirements\u003c\/li\u003e\n\u003cli\u003eGE\/A designation for the American market\u003c\/li\u003e\n\u003cli\u003ePowered by AC adapter (included) or batteries\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Capacity\u003c\/th\u003e\n\u003ctd\u003e6,200 g \/ 199 troy oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReadability\u003c\/th\u003e\n\u003ctd\u003e0.1 g \/ 0.05 dwt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBalance Dimensions\u003c\/th\u003e\n\u003ctd\u003e7-5\/8\" W × 8-7\/8\" D × 2-1\/2\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeighing Pan Diameter\u003c\/th\u003e\n\u003ctd\u003e90 mm (3-1\/2\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUsable Height of Draft Shield\u003c\/th\u003e\n\u003ctd\u003e6-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\u003ctd\u003e3 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eAC adapter or batteries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLegal for Trade\u003c\/th\u003e\n\u003ctd\u003eUSA Class II — NIST Handbook 44 compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e1-year limited manufacturer warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMettler JL6001GE\/A scale\u003c\/li\u003e\n\u003cli\u003eAC adapter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Mettler","offers":[{"title":"Default Title","offer_id":43583403819222,"sku":"151.261","price":1878.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/mettler-jl6001gea-legal-for-trade-6200-grams-x-0-1-gram-multi-function-scale-otto-frei.jpg?v=1719956669"},{"product_id":"large-natural-test-stone-6x3-wood-box-eurotool","title":"Large Natural Test Stone 6\" x 3\" In Wood Box","description":"\u003cp\u003eThe Large Natural Test Stone is an essential tool for jewelers and metalsmiths who need to verify the karat value of precious metals. This professional-grade stone allows you to test silver, platinum, and gold with accuracy and confidence. The generous 6\" x 3\" surface area provides ample working space for performing multiple streak tests, making it well-suited for busy bench work. Each stone arrives ready to use and is presented in a wood storage box with a magnetic closure, keeping the stone protected and secure between uses.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLarge 6\" x 3\" testing surface provides generous workspace for streak testing\u003c\/li\u003e\n\u003cli\u003eTests silver, platinum, and gold to determine karat value\u003c\/li\u003e\n\u003cli\u003eNatural stone construction for reliable, professional-grade testing\u003c\/li\u003e\n\u003cli\u003eIncluded wood storage box with magnetic closure protects the stone when not in use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e6\" x 3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBox Type\u003c\/th\u003e\n\u003ctd\u003eWood box with magnetic closure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Metals\u003c\/th\u003e\n\u003ctd\u003eSilver, platinum, gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eEurotool\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 large natural test stone (6\" x 3\")\u003c\/li\u003e\n\u003cli\u003eWood storage box with magnetic closure\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Eurotool","offers":[{"title":"Default Title","offer_id":43583579128022,"sku":"156.715","price":40.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/large-natural-test-stone-6-x-3-in-wood-box-otto-frei.jpg?v=1719956601"},{"product_id":"diamond-scribe-pen-retractable-5-3-4in","title":"Diamond Scribe Pen","description":"\u003cp\u003eThe Diamond Scribe Pen is a dual-purpose tool designed for jewelers, gemologists, and metalworkers who need a reliable scriber and a quick preliminary stone-screening tool in one compact instrument. Styled and sized like a writing pen at \u003cstrong\u003e5-3\/4\" long\u003c\/strong\u003e, it features a \u003cstrong\u003eretractable diamond tip\u003c\/strong\u003e that extends and retracts with a simple twist of the barrel — keeping the tip safely protected during storage and transport.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRetractable Diamond Tip:\u003c\/strong\u003e Twist-action barrel extends or retracts the tip for safe, convenient storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal Marking:\u003c\/strong\u003e Functions as a traditional scriber for marking metals with precision.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePreliminary Stone Screening:\u003c\/strong\u003e Provides a quick scratch test to help identify stones that are \u003cem\u003enot\u003c\/em\u003e diamonds — if a stone scratches under the tip, it is not a diamond.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePen-Style Form Factor:\u003c\/strong\u003e Familiar, comfortable grip that handles like a writing instrument.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003ctd\u003e5-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTip Type\u003c\/th\u003e\n\u003ctd\u003eDiamond\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTip Mechanism\u003c\/th\u003e\n\u003ctd\u003eTwist-action retractable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtend the tip\u003c\/strong\u003e by rotating the pen body until the diamond tip is fully exposed.\u003c\/li\u003e\n\u003cli\u003eFor metal marking, lightly scribe your line as you would with any standard scriber.\u003c\/li\u003e\n\u003cli\u003eFor a preliminary stone check, gently draw a short line on an inconspicuous area of the stone's surface.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eInterpreting Results\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIf the stone shows a visible scratch: \u003cstrong\u003eit is not a diamond\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIf the stone does not scratch: further testing is required to confirm the stone's identity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDestructive test:\u003c\/strong\u003e This method may scratch the stone. Only perform this test if surface damage to the stone is acceptable.\u003c\/li\u003e\n\u003cli\u003eThis tool does \u003cstrong\u003enot\u003c\/strong\u003e differentiate between \u003cstrong\u003enatural and lab-grown diamonds\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThis tool does \u003cstrong\u003enot\u003c\/strong\u003e differentiate between \u003cstrong\u003ediamonds and moissanite\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIts sole screening function is to indicate that a stone which scratches under the tip is \u003cstrong\u003enot\u003c\/strong\u003e a diamond — a non-scratch result does not confirm diamond identity.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43584067010774,"sku":"156.747","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/diamond-scribe-pen-otto-frei-1.jpg?v=1719956419"},{"product_id":"gemoro-2017-auracle-silver-label-pen-probe-agt1-agt3","title":"GemOro 2017 AuRACLE Gold Tester Silver Label Pen Probe for AuRACLE AGT1 and AGT3","description":"\u003cp\u003eThe GemOro 2017 AuRACLE Silver Label Pen Probe is a replacement testing pen designed exclusively for use with the GemOro AuRACLE AGT1 and AuRACLE AGT3 gold testers. This universal pen replaces earlier model-specific probes — a single Silver Label pen now works with either the AGT1 or AGT3, streamlining your testing supplies.\u003c\/p\u003e\u003cp\u003eWhen properly maintained, each pen is rated for up to 1,000 tests. The pen contains a non-toxic, salt water-based solution. \u003cstrong\u003eAlways replace the cap immediately after use\u003c\/strong\u003e — leaving the cap off will cause the solution to dry out prematurely and require early replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant Compatibility Note:\u003c\/strong\u003e This Silver Label pen is compatible with the AuRACLE AGT1 and AGT3 only. The GemOro AuRACLE Pro and GemOro AuRACLE Analyzer require the Gold Label GemOro 2018 replacement pen probe — these are not interchangeable.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUniversal Silver Label design works with both the AuRACLE AGT1 and AuRACLE AGT3\u003c\/li\u003e\n\u003cli\u003eReplaces older model-specific probes with a single universal pen\u003c\/li\u003e\n\u003cli\u003eRated for up to 1,000 tests with proper care and cap use\u003c\/li\u003e\n\u003cli\u003eContains a non-toxic, salt water-based solution\u003c\/li\u003e\n\u003cli\u003eCap-protected tip to prevent premature drying\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003ctd\u003eGemOro AuRACLE AGT1 and AuRACLE AGT3 only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSolution Type\u003c\/th\u003e\n\u003ctd\u003eNon-toxic, salt water-based\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated Test Life\u003c\/th\u003e\n\u003ctd\u003eUp to 1,000 tests (with proper care)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLabel Version\u003c\/th\u003e\n\u003ctd\u003eSilver Label (2017)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVariant Count\u003c\/th\u003e\n\u003ctd\u003eSingle variant — no options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAlways replace the cap after each use to prevent the solution from drying out.\u003c\/li\u003e\n\u003cli\u003eDo \u003cstrong\u003enot\u003c\/strong\u003e use this pen with the AuRACLE Pro or AuRACLE Analyzer — those models require the Gold Label 2018 pen probe.\u003c\/li\u003e\n\u003cli\u003ePrevious pen probes were model-specific; this 2017 Silver Label pen is universal for AGT1 and AGT3.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GemOro","offers":[{"title":"Default Title","offer_id":43584899350742,"sku":"156.799-UNV","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/156.799-UNVNEW_thumb_aaede3e2-27e7-41db-93e3-7376556d8b5b.jpg?v=1756153614"},{"product_id":"gemoro-platinum-v600m-super-mini-pocket-scale","title":"GemOro Platinum V600M Super Mini Pocket Scale","description":"\u003cp\u003eThe \u003cstrong\u003eGemOro Platinum V600M Super Mini Pocket Scale\u003c\/strong\u003e is a compact, precision digital scale designed for jewelers, gemologists, and metalsmiths who need reliable weight measurements on the go. With a 600g capacity and 0.1g readability, it supports multiple weighing units — including \u003cem\u003edwt\u003c\/em\u003e, \u003cem\u003eozt\u003c\/em\u003e, and \u003cem\u003eoz\u003c\/em\u003e — making it a versatile tool for everyday bench and counter use.\u003c\/p\u003e\u003cp\u003eThe bright blue backlit LCD display ensures clear readings in a variety of lighting conditions, while the stainless steel weighing platform provides a durable, easy-to-clean surface. 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