I was serious about weighing it; getting an accurate electronic or manual reading. If it doesn't match a zinc's or a copper's weight, then you know you're on to something.
The aluminum cents are just aluminum, not plated. They are only dated 1974, and are technically illegal to own (unless you're the Smithsonian).
Sorting Map 2010 First Finds Contest Are you a Buffalo Hunter? Wanna take seignorage away from the Fed? Spend *any* coins! We cannot afford this government. Cerulean's Standing Offer: $3/lb shipped for foreign coins