GOLD TEST STONE 2X3

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

• 2″ × 3″ professional gold testing stone

• Used with gold, silver, and platinum testing acids

• Finely grained black surface for clear metal streaks

• Durable stone designed for repeated testing

• Essential tool for jewelers and precious-metal buyers

Applications

• Testing gold karat purity

• Identifying gold-plated jewelry

• Scrap gold evaluation

• Jewelry repair and appraisal

• Pawn shop and refinery testing

Product Specifications

• Product Type: Precious metal testing stone

• Size: 2″ × 3″

• Material: Natural Obsidian

• Use: Acid scratch testing for gold, silver, and platinum