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<p>[QUOTE=&quot;Kentucky, post: 2413455, member: 33176&quot;]I&#039;m rich...I&#039;m rich...I&#039;m rich...&nbsp; OK, I&#039;m not.&nbsp; Cleaning out a bit and ran into these made by students in the chem lab &quot;silver and gold pennies&quot; experiment.&nbsp; The students first clean and coat a cent with zinc.&nbsp; If they shine it up it appears &quot;silver&quot;.&nbsp; Now if they put it on a heating plate (or in a Bunsen burner with tongs) it magically turns &quot;gold&quot;...well, brass actually.&nbsp; Some better than others.</p><p>[ATTACH=full]499108[/ATTACH][/QUOTE]</p><p><br /></p>

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