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<p>[QUOTE=&quot;Collect89, post: 1155743, member: 15445&quot;]<b>Please don&#039;t try this at home</b></p><p><br /></p><p>If you are looking for an interesting metal how about using Sodium?&nbsp; Sodium is a soft metal.&nbsp; It may not last long in our everyday environment but it would be a blast if someone were to go swimming with the coin in their pocket.&nbsp; </p><p><br /></p><p>Here is a link describing some coin chemistry that affects the look of normal US cents.</p><p><br /></p><p><a href="http://www.metacafe.com/watch/1262456/make_a_gold_penny/" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.metacafe.com/watch/1262456/make_a_gold_penny/" rel="nofollow">http://www.metacafe.com/watch/1262456/make_a_gold_penny/</a></p><p><br /></p><p>Practically speaking, you should probably stick to soft conventional metals because they would be easier to mint.&nbsp; Aluminum, Aluminum-Bronze, Copper, Gold, Electrum, and Silver come to mind.&nbsp; Nickel and some of it&#039;s alloys can be very hard.&nbsp; Plastic with a metal or lacquer coating might be interesting.</p><p><br /></p><p>P.S.</p><p>Be careful if you use Uranium.&nbsp; The coins would be very heavy &amp; one extra coin in the roll could create a critical mass.[/QUOTE]</p><p><br /></p>

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