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<p>[QUOTE=&quot;desertgem, post: 1360714, member: 15199&quot;]Compare the color to the photo in this url in the part &quot;How it works&quot;</p><p><a href="http://www.stevespanglerscience.com/experiment/gold-pennies" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.stevespanglerscience.com/experiment/gold-pennies" rel="nofollow">http://www.stevespanglerscience.com/experiment/gold-pennies</a></p><p><br /></p><p>To me the experimental coin on the right compares to the color of yours as I see the photos. This experiment in various beginning chemistry classes produce a large number each year that goes back into circulation when people get tired of them.</p><p><br /></p><p>Basically zinc dust mixture and heat makes a thin layer of &quot;yellow brass&quot; on the surface of the coin. The weight would not be easily detected. My memory is that Ken Potter had to submit his coins which came uncirculated, to the mint to do spectroscopic tests on them to indicate that the brass outer layer was consistent with what would be expected from the mint if they made such.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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