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<p>[QUOTE=&quot;Clawcoins, post: 3170082, member: 77814&quot;]Copper, being a metal, will change in color depending upon what it&#039;s exposed to.</p><p><br /></p><p>Does steel rust if you leave it outside?</p><p>Ever seen copper on houses that turns green / or bronze statues ?</p><p><br /></p><p>Copper, on the lower end, tarnishes.&nbsp; which is oxide formation with the copper, as when it&#039;s exposed to air. It can start turning pink at first, and as it gets &quot;thicker&quot; and is corrosion it then later turns black.</p><p><br /></p><p>at least that&#039;s my simple understanding of it.</p><p><br /></p><p>Ever seen a silver coin .. or anything silver, turn black over time ?</p><p><br /></p><p>Ever use Copper plated cooking ware ?</p><p><br /></p><p>Look up Copper Oxide .... it&#039;s black.[/QUOTE]</p><p><br /></p>

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