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Yes, the tarnish is copper oxide. But actually the tarnish is not from when the pennies are made (brand new pennies are shiny); the tarnish is from the copper of the penny reacting with the oxygen in the air over time.

The article I have given a link for is quite funny, but it also very informative as regards to pennies, so you might want to check it out.

plz decuse the reason why tarnish gets on pennies

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13y ago

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