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<p>[QUOTE=&quot;Bob Evancho, post: 5247247, member: 84595&quot;]HI.&nbsp; If you are doing testing in your house, make sure you do it near your sink.&nbsp; If you have a mishap, bottle leaks or spills (yes the top of the bottle with the dropper can fail and spill the contents) you can flush with baking soda and water to neutralize the surface before the acid eats into you or the surface you are working on.&nbsp; If you wear gloves, make sure they are acid resistant and not cotton or any material.&nbsp; The acid would just seep through the material and burn your skin.&nbsp; </p><p>&nbsp; US Law mandates (National Gold and Silver Stamping Act, 1905 with amendments) that gold jewelry sold by a vendor MUST be stamped with a marking that indicates the items karat number.&nbsp; The Law also states the real purity of the piece can deviate by up to 0.5 karats from the karat weight. PLUMB Gold must be a true Karat and is marked with a P. 14KP must be a true 14K and not 13.5K as permitted. That means the clasp and the piece itself MUST be marked.&nbsp; Before testing, look for the gold karat marks first.&nbsp; Look for a manufacturer.&nbsp; Be wary of items marked &quot;made in China&quot;.&nbsp; I have a large collection of counterfeit jewelry, coins and bullion made in China. </p><p>&nbsp; Don&#039;t clean your stone on your backpack, shirt, pants, any material.&nbsp; Wash the stone to neutralize the acid.&nbsp; I have two stones and rub them together to remove the old gold scratches.&nbsp; Follow the advice given by members here to be cautious.&nbsp; Those acids burn.&nbsp; Don&#039;t breathe the fumes.&nbsp; Neutralize with baking soda and water or at least plenty of water.&nbsp; Don&#039;t test coins.&nbsp; Use known counterfeit detection methods first on a coin.&nbsp; As you study, you will learn die characteristics of coins and the means to identify a genuine coin by the characteristics of the die used to mint that particular variety of coin.&nbsp; Learn what RGP, GF, HGE, and other initials mean.&nbsp; Be a careful, happy silver and gold tester.&nbsp; Enjoy the coin collecting hobby and the Bullion end of the hobby.[/QUOTE]</p><p><br /></p>

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