ST720 = Natural Testing Stone 5" x 2" in Wood Box ST720 = Natural Testing Stone 5" x 2" in Wood Box ST720 = Natural Testing Stone 5" x 2" in Wood Box
ST720 = Natural Testing Stone 5" x 2" in Wood Box ST720 = Natural Testing Stone 5" x 2" in Wood Box ST720 = Natural Testing Stone 5" x 2" in Wood Box

ST720 = Natural Testing Stone 5" x 2" in Wood Box

$19.95
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Article number: ST720
Availability: In stock

A genuine, natural obsidian 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.

This stone come in a wood storage box with magnetic closures.

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