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<p>[QUOTE=&quot;Curtisimo, post: 2594625, member: 83845&quot;]So you said you weighed them and they were spot on correct?&nbsp; I&#039;m not totally convinced that computer software could spot a fake just from the ring consistently if that is your only evidence.&nbsp; Just seams like there are too many variables (distance from microphone, force of the strike to produce the sound etc.). Did you test the software on several legitimate coins to make sure it could distinguish?</p><p><br /></p><p>One thing you could try is to test the coin&#039;s specific weight.&nbsp; The specific weight = weight of coin / volume of coin.&nbsp; You can measure the exact volume of a coin by putting it in a graduated cylinder filled with water and measuring the displacement. You can find instructions online if you google it. Compare the specific weight you calculate agains the specific weight of a 90% silver 10% copper alloy. If the forgers used real silver then I think there&#039;s no problem. Just cull the coins and keep them for their silver content.[/QUOTE]</p><p><br /></p>

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