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All Forums Category: US Coins and Currency Forums Forum: US Classic and Colonial Variety and Error Coins

Buffalo Nickel Turning Green

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sel_69l
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 Posted 05/01/2019  09:16 am  Show Profile   Bookmark this reply Add sel_69l to your friends list Get a Link to this Reply
There are quite a few inorganic an some complex organic corrosion salts of both copper and nickel.

What is needed to produce what you see here is chlorine in a complex organic form, and moisture. Soft PVC album pages in a humid environment would be a typical way to produce the sort of result that is pictured.

I agree: give it a rub between the fingers with good old soap 'n water, then rinse in acetone, to remove the organics of soap residue and skin oils.
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