This 2″ × 3″ Gold Testing Stone is a professional jewelry testing tool used to determine the karat purity of gold, silver, and platinum when used with testing acids. The finely grained black stone surface allows metals to leave a visible streak, enabling jewelers to apply testing solutions and observe the chemical reaction to identify metal purity.
Gold testing stones—often called touchstones—have been used for centuries to verify precious metal purity by comparing the reaction of the metal streak with specific acid solutions.
Compact and durable, the 2″ × 3″ size is a standard bench tool for jewelry repair shops, pawn shops, refiners, and precious-metal buyers.
Key Features
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2″ × 3″ professional gold testing stone
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Used with gold, silver, and platinum testing acids
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Finely grained black surface for clear metal streaks
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Durable stone designed for repeated testing
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Essential tool for jewelers and precious-metal buyers
Applications
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Testing gold karat purity
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Identifying gold-plated jewelry
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Scrap gold evaluation
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Jewelry repair and appraisal
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Pawn shop and refinery testing
Product Specifications
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Product Type: Precious metal testing stone
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Size: 2″ × 3″
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Material: Natural Obsidian
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Use: Acid scratch testing for gold, silver, and platinum
Hps1source is a Business-to-Business only distributor to those in the Jewelry Industry. All online orders are collected without payment and verified before being charged and shipped.
First time online customers may submit orders online without payment and a representative from our customer care team will reach out within 48 business hours.
Orders received by 3PM to often ship same day! We offer flat rate shipping on orders under $150 and free shipping on orders over $150.
*Orders too large to fit in an 8x8x8 box or weighing more than 5lbs do not quality for flat rate or free shipping.
You have 30-days from the time of receipt to return your item for a full refund. Customer is responsible for return shipping.
*Capacitors and Special-Order Items are not eligible for return.
Equipment and Tools come with original manufacturer warranty. As a distributor, Hps1source offers no warranty. Products made by Hps1source come with a 90-day warranty.