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<p>[QUOTE=&quot;GDJMSP, post: 2235483, member: 112&quot;]Yes it can, provided there is enough of it. But melting is a result of heat, and there is not enough heat generated by the striking of a coin to melt any coinage metal. Not even close to enough.</p><p><br /></p><p><br /></p><p><br /></p><p>Uhhh, no, it isn&#039;t. Regardless of the weight differential there are still a given number of atoms. And in a 90% coin the gold atoms outnumber the copper atoms 9 to 1. Granted the gold atoms are smaller than the copper atoms, but the number of them does not change.</p><p><br /></p><p>Nor does it change the fact that the copper atoms would still have to be present at the very surface in order for them to tone. If they are not at the very surface then it is not possible for them to tone because they are not exposed to the air.[/QUOTE]</p><p><br /></p>

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