{"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","url":"https:\/\/www.ottofrei.com\/ja\/products\/large-natural-gold-test-stone-6x4","provider":"Otto Frei","version":"1.0","type":"link"}