3176

Original Touchstone Needles for assaying, RARE

Currency:USD Category:Collectibles / Mining Start Price:250.00 USD Estimated At:500.00 - 1,000.00 USD
Original Touchstone Needles for assaying, RARE
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This is the first set we ave ever offered for auction. Needles are numbered 4, 6, 8, 10, 12, 14,1 6,1 8, and 20. A simpler method for determining gold purity in jewelry is the “touchstone” testing process, an age-old technique that is relatively nondestructive to jewelry and offers quick results. Your testing kit includes a set of testing needles. Using these needles and an acid, one can get a quick karat value. Manufactured by Bullock & Company of Springfield, Massachusetts.

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HWAC#: : 31970