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<p>[QUOTE=&quot;GDJMSP, post: 146314, member: 112&quot;]From a technical perspective, all pre-&#039;82 cents are brass. The definition of brass is an alloy composed of copper and zinc. Pre-&#039;82 cents are composed of 95% copper and 5% zinc with a tiny percentage of tin thrown in. That makes them all brass.</p><p><br /></p><p>Granted, there are various forms of brass with higher copper/zinc ratios, you can find the standard conformance table - <a href="http://www.csp.ir/TbE02.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.csp.ir/TbE02.htm" rel="nofollow">HERE</a>.</p><p><br /></p><p>Regarding the differences in coloring of US cents, it can be attributed to several things. It can be toning as mentioned, it can be a bad alloy mix or it can be a result of planchet washing. But it is not uncommon to find the coins in various colors even fresh from the mint.[/QUOTE]</p><p><br /></p>

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