{"product_id":"presidium-gem-tester-ii-pgt-ii-thermal-gem-tester","title":"Presidium Gem Tester II","description":"\u003cp\u003eRead how fast a stone conducts heat and put a name to it at the bench, mounted or loose. The \u003cstrong\u003ePresidium Gem Tester II (PGT II)\u003c\/strong\u003e gives jewelers and gemologists fast, laboratory-proven answers to the questions that come up every day: diamond or moissanite, ruby or garnet, sapphire or tanzanite, emerald or jadeite. This professional-grade color stone estimator takes human error out of gem identification by measuring the rate at which each gemstone type conducts heat, a physical property unique to the stone.\u003c\/p\u003e\u003cp\u003eTouch the thermoelectric probe to the surface of a stone and the calibrated dial shows the relative heat conductivity of the material, allowing 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 a new \u003cstrong\u003eDiamond\/Moissanite\u003c\/strong\u003e indicator. Because moissanite conducts heat at a rate identical to diamond, the updated dial alerts you when a stone falls within that range, signaling that additional visual testing is required to separate 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 reads \u003cstrong\u003eDiamond\/Moissanite\u003c\/strong\u003e and alerts you when further visual testing is needed\u003c\/li\u003e\n\u003cli\u003eThermoelectric probe measures the 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 you 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: two AA batteries or the included 110V AC adapter\u003c\/li\u003e\n\u003cli\u003e1-year factory warranty included\u003c\/li\u003e\n\u003c\/ul\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, because both materials conduct heat at the same rate. When a stone tests in the Diamond\/Moissanite range, inspect it with a 10x loupe: moissanite displays double refraction under magnification and 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","url":"https:\/\/www.ottofrei.com\/it\/products\/presidium-gem-tester-ii-pgt-ii-thermal-gem-tester","provider":"Otto Frei","version":"1.0","type":"link"}