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<p>[QUOTE=&quot;desertgem, post: 1375156, member: 15199&quot;]I am a little confused on the &quot;electric test&quot; the dealer did with a pen type device. Generally these do not damage the metal. They are used on expensive settings by jewelers and can not leave a permanent mark, and generally are small battery operated and won&#039;t generate enough heat to do anything to the metal. Did you watch the procedure, or is there a chance he used acid solutions to determine the gold content, which would leave a mark. If it is a &quot;burn&quot;, or any mark, I would use some acetone, just in case it is a plastic mark, and if not either leave it or try an eraser sharpened to a point to gently see if you can remove it the stain. That will also leave visible evidence, and <b>should never </b>be used on a coin with other than metal value, unless it is a partial loss anyway. Possibly if the dealer knew what you paid for it, perhaps they assumed it was just bullion and that they might end up with it and tested it &quot;real well&quot; with acid. IMO. Photo would be interesting.[/QUOTE]</p><p><br /></p>

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