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Large Gold Testing Stone with Case

Large Gold Testing Stone with Case

A large natural stone for testing gold, silver, and platinum. Measures 6" x 3" x 3/8". Furnished in a fitted wood storage box with a magnetic closure. testing stone is removable from the box and is reversible. The object to be tested is scratched on the surface of the stone and a test acid solution determines the karat of the scratch. Can also be used with test needles to confirm karat markings.

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