First, in early times, the "penny" was made out of gold. Then it was silver. Then it was a big piece of copper (bronze). Then it was a small piece of copper. And now it is lowly zinc, plated with copper.
in the interests of full disclosure, that's just something I stumbled across didn't mean that to come off as my own experiment, I just thought it was cooooool....
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Amat Colligendo Focum
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Then it was silver.
Then it was a big piece of copper (bronze).
Then it was a small piece of copper.
And now it is lowly zinc, plated with copper.
PS:
Nice "rainbow"
in the interests of full disclosure, that's just something I stumbled across