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<p>[QUOTE=&quot;Al Kowsky, post: 5010350, member: 97383&quot;]P.O. Man, I had purchased a testing kit that consisted of a special fine-grained carborundrum stone, 4 X 2.5 X .375 in., &amp; different dilutions of nitric acid. It was necessary to scrape the edge of the coin on the stone &amp; apply a dilution of nitric acid that didn&#039;t change the color of the streak on the stone. The amount of gold lost was infinitesimal, &amp; the coin appeared to be clipped anyway. The coin cost me $100.00 &amp; ended up selling for well over $400.00 <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" />.[/QUOTE]</p><p><br /></p>

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