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<p>[QUOTE=&quot;Kentucky, post: 2150004, member: 33176&quot;]I teach chemistry and one of the labs students do is called the silver and gold pennies lab.&nbsp; In the lab, they make a thin coating of zinc on a penny, and if they shine it up, it kind of looks like silver.&nbsp; Next they can put the zinc coated penny on a hotplate and heat it up till the zinc amalgamates with the copper to make a brass coated penny.&nbsp; Looks like this is what you got.[/QUOTE]</p><p><br /></p>

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