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<p>[QUOTE=&quot;-jeffB, post: 1317284, member: 27832&quot;]Nothing could be further from the truth.</p><p><br /></p><p>Returning to my earlier example, lead is denser than silver, and copper is less dense than silver. By alloying them -- mixing them in various proportions -- you can produce any density between those two that you want, including the precise density of silver. (It&#039;s actually a bit more complex than that; sometimes a binary (two-component) alloy can be denser or less dense than either of its components. But that&#039;s not the usual case.)</p><p><br /></p><p>The &quot;laws of physics&quot; also dictate that most elements will change their density with temperature and pressure, but that&#039;s not really relevant to this discussion, either. Those changes aren&#039;t large enough to be a useful diagnostic for coins.</p><p>&nbsp;</p><p><br /></p><p><br /></p><p>That&#039;s a separate issue. Emulating silver&#039;s mint luster would be really tough. A realistic patina on a circulated coin is a lot easier.[/QUOTE]</p><p><br /></p>

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