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

Why would my 1967 penny weigh 1.25? It's really thin but stamped

How Coins Are Made, News

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

What's a Penny Made Of?

Separating Copper and Zinc from a Penny - HubPages

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

Separating Copper and Zinc from a Penny - HubPages

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

Solved Part A An American penny is 97.5% zinc and 2.5%