Multimedia Gallery - This image shows copper in ore. The penny is 97.5 percent zinc and 2.5 percent copper.

Penny Problem

Why are US coins made out of metals like copper and nickel? - Quora

As of 2021, how much is the copper worth in an older United States

Penny U.S. Mint

Mine Tales: Mining metals from pocket change

The Penny May Be Worthless, but Let's Keep it Anyway

The penny may be worthless, but let's keep it anyway

Multimedia Gallery - This image shows copper in ore. The penny is

Canada Drops the Penny, but Will the U.S.? - The New York Times

Solved SHOW WORK (ATTACH DATA AND OBSERVATIONS PAGES) 1.

Your penny may be worth $18,000 - the exact 'small date' error to

Penny U.S. Mint

Solved Pennies that are made by the US Mint today are 97.5

How Coins Are Made, News