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Precious Metal Testing Methods & Equipment   Manhattan ...

Precious Metal Testing Methods & Equipment Manhattan ...

Whether its acid kits, stones or portable thermal and electrical

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  • Gold Testing Acids and Equipment - Kassoy

    Results 1 - 19 of 19 — Using a kit is simple and efficient: scratch or rub the precious metal onto a stone and then place roughly half a drop of acid 

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

    Both methods require costly , special procedures and a well-lit and ventilated area. A simpler method for determining purity in jewelry is the 

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