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Home » 56.719 = TESTING STONE NATURAL 4 x 2 x 1/4''
56.719 = TESTING STONE NATURAL 4 x 2 x 1/4'' 56.719 = TESTING STONE NATURAL 4 x 2 x 1/4''
56.719 = TESTING STONE NATURAL 4 x 2 x 1/4'' 56.719 = TESTING STONE NATURAL 4 x 2 x 1/4''

56.719 = TESTING STONE NATURAL 4 x 2 x 1/4''

$14.95
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Article number: 56.719
Availability: Out of stock

A black touchstone for scratch testing silver, platinum and gold with gold testing solutions.  Rub the article to be tested on the stone and apply the testing solution to the mark to determine the karat value.

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