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Message:: [QUOTE="-jeffB, post: 25109628, member: 27832"]It's not that much smaller in diameter or thinner, and it doesn't weigh that much more. The thickness comparison you're doing is based just on the coin's rim, and a coin's rim makes up only a small percentage of the coin's weight. (This gets really pronounced in old silver like Barber coins or Standing Liberty quarters, where a worn coin might lose 5% of its weight, but a good 20% of its "thickness" -- the high points and the rim are the first parts to get worn away or beaten down.) If you could measure your coin's entire profile, you'd find that its volume isn't significantly different from a regular cent. In fact, you could do a water-displacement test and calculate its actual specific gravity, although it's hard to get accurate readings at this scale without some specialized equipment.[/QUOTE]