1993 cent. Looks as if this was never plated? It's not smooth like a regular cent. And it still weighs 2.5.
environmental damage. If it was unplated, it would look gray or silver. Your's is greenish brown, like it was buried for a while.
Thee unplated planchet should be weight less than 2.5gr. Around 2.4gr. Yours look ED (Environmental Damaged).
That's the problem. If it was a non-plated planchet the surfaces should be smooth like a regular cent. Removing the plating results in the rough surface. As for a genuine having to show some luster, I would not accept one that didn't. Too easy to remove evidence of removed plating with some wear. But you can't add luster to a removed plating coin.