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<p>[QUOTE=&quot;Hobo, post: 1319096, member: 11521&quot;]That&#039;s right. Copper-nickel will tarnish if dropped or buried in the ground. There are numerous other ways a clad coin can get environmental damage. </p><p><br /></p><p><br /></p><p><br /></p><p>I know of no way that could happen other than melting the coin. And I think the melting point of copper is lower than copper-nickel which means the copper core would flow out from between the copper-nickel layers before the copper-nickel layers melt. </p><p><br /></p><p><br /></p><p><br /></p><p>More likely the coin got tarnished either naturally or by accident rather than intentionally.[/QUOTE]</p><p><br /></p>

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