It's almost certainly zinc rather than aluminum. The only time aluminum cents were made was 1974, and these were experimental pieces never put into circulation.
Since 1982 US cents have been made of copper-plated zinc. If the copper plating was removed (e.g. by dipping it in acid) the silver-colored zinc will show.
Compare the coin's weight to a standard cent minted after 1982. If they're the same, your coin is just an unplated zinc penny. An aluminum cent would weigh only about 1/3 as much as its zinc counterpart.
There's no such thing.
It is worth a penny
A common penny has a value of 1 penny only
It's made of zinc-plated steel, not aluminum. In average condition a so-called "war penny" is worth 10 cents to a half-dollar
0.01 USD. The face value.
There's no such thing.
There is no market value for the 1974 aluminum cent because it's illegal to own one.
Because the legality of the coins is in doubt and currently are illegal to have, a value can't be given.
1943 cents were minted from zinc coated steel, not aluminum. If they were aluminum they'd be so light they could blow away from your hand in a slight breeze. For prices, see the following link
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Most likely you have seen a fake. Someone probably electroplated an ordinary 1976 d penny with silver or aluminum. Check its weight. Aluminum is light, less than 1/3rd the density of copper. Compare its weight with a copper penny. If the "aluminum" penny is just as heavy, then it is a electroplated penny. If it is light, then it is a complete fake.
It sounds like you're referring to the 1943 wheat penny, which is actually made of zinc-coated steel, not silver or aluminum. In circulated condition, one is worth about 10 cents.
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It's zinc-coated steel, not aluminum or silver(*). Copper was needed to make ammunition so in 1943 the mint made pennies out of scrap steel instead of bronze. About a billion were struck and a lot of them were saved so they don't have much extra value. In average condition they're worth about a quarter, plus or minus. (*) If you consider it for a minute, a silver penny would have been worth more than a dime and an aluminum penny would be so light it would blow away in a slight breeze, so it couldn't be either of those metals.