8" x 3" x 1/2" Gold Testing Black Stone

Introducing the 8" x 3" x 1/2" Gold Testing Black Stone, a reliable tool for determining the karat value and purity of precious metals. Designed to be used with standard testing solutions and testing needles, this black stone delivers clear, consistent results during jewelry appraisal, refiner work, or at-home metal testing.

Key benefits include a rugged, non-porous surface that resists staining and a comfortable size that fits both field kits and lab setups. Whether you’re verifying gold, platinum, or alloy content, this stone supports accurate results with every test.

• Precise karat testing surface for reliable alloy identification
• Durable, reusable black stone designed for daily use
• Compatible with testing solutions and needles
• Generous 8" x 3" x 1/2" size suits various workflows

Invest in dependable accuracy for your precious metals work. Enhance your assay toolkit with this Gold Testing Black Stone—streamline your purity verification process. When you’re ready, add it to your cart.