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Testing Stone

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Testing Stone

Use this black stone to test silver and the karat value of gold pieces. Rub the test needle and the test article on the touchstone, then apply test solutions to determine the karat value.

$13.39
Testing Stone—
$13.39

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Description

Use this black stone to test silver and the karat value of gold pieces. Rub the test needle and the test article on the touchstone, then apply test solutions to determine the karat value.