testing stone

The Gold Testing Black Stone (1-1/2" x 2") is your essential tool for accurate karat testing. This durable, non-porous surface is designed to pair with testing solutions and needles to determine the karat value and overall purity of your precious metals with confidence.

Whether you’re a jewelry maker, appraiser, or hobbyist, this stone delivers reliable results in busy workshops and on quiet benches. It supports precise purity verification across gold, silver, platinum, and other precious metals. The black surface reduces glare and makes color testing easier, while its compact size fits neatly into most assay kits and workstations.

• Size: 1-1/2" x 2" black testing stone for a stable work surface
• Compatibility: works with standard testing solutions and needles for accurate karat assessment
• Durability: non-porous surface for repeated use and easy cleaning
• Versatility: ideal for gold, silver, platinum, and other precious metals