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Large Size Gold Testing Stone

Large Size Gold Testing Stone

A dark stone, used for testing gold karat as well as silver and platinum. The object to be tested is scratched on the surface of the testing stone and a test acid solution determines the karat of the scratch. Can also be used with test needles to confirm karat markings. Measures 6" x 3-7/8" x 3/8".

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Availability: In stock

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