Bench Tip #9: Use the Touchstone Method for Testing Purity in

This article explains how to use the touchstone method for testing purity in karat gold.

Touchstone Method for Testing Purity in Karat Gold - How-To Video - Ganoksin Jewelry Making Community

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Bench Tip #9: Use the Touchstone Method for Testing Purity in Karat Gold

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This EASY to use genuine GTE white 2”x2” test stone is a useful tool to use with testing acids when determining the karat value and purity of Gold,

GTE *White* 2''x2'' Testing Touchstone Streak Stone for Gold Silver Jewelry Precious Metal Sterling Acid Solutions 10K 14K 18K 22K .999 24K

Bench Tip #9: Use the Touchstone Method for Testing Purity in Karat Gold

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