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How to tell what your penny is made of
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Melting down your copper pennies
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Comparison of Copper and Zinc Pennies - Stock Image - C039/1081
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How to Tell What Your Penny Is Made of
Copper v. Zinc Pennies
Solved Pennies today are copper-covered zinc, but older | Chegg.com
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How to Tell What Your Penny Is Made of
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