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Taking Care Of Coins. Six Coin Care Rules For Preserving Your Expensive Ancient Coins. - By: Theo Steward, 2009-04-08 Collectible coins are never handled directly. Living human skin contains chemicals that are usually transferred to the surface of the coin. Gold coins excepted, most other collectible coins are made of metal. The chemicals of the skin that are left behind on the metal will eventually cause deterioration. COMMENTS Add a comment |