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  • No precious metal is magnetic.

  • We use 10k, 14k, 18k, 22k nitric acid on a scratch test.

  • If the scratch stays the same color, no change, as the acid used, it is that karat of gold.

  • If the scratch turns brownish, it's a lessor karat than the acid used to test it.

  • If the scratch disappears, it is not gold.

  • In some cases, especially heavy items, we will file into the item and put acid directly on the item.

  • If the acid stays clear, it's good.  If it turns bubble green or blue, it is plated.

  • Silver Testing: 18k acid will turn the silver scratch into a bright blue color

Gold & Silver Testing: About Us
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