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.

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

How Does a Touchstone Work?

Tips from the Bench

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This touchstone is used to verify the gold content in items Apply a drop acid test on touchstone, real gold will stay on the touchstone, fake one will

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How did chopmarks validate coins?