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I am puzzled by this.. Seems to be only coins that contain copper. My Lincoln cents had this issue a few years back. I ended up replacing all my cents once I started sorting for copper.. But now I noticed my buffalo nickels, dimes, Washington quarters, and Kennedy half dollars are starting to show Verdigris growth along the edges of the coins.

All coins are stored on my first floor in a safe. I didn't think moisture level and humidity would be a problem.. but I suppose I was wrong. What can I do to prevent further growth? Are these coins pretty much damaged? Or could I possibility be able to salvage them? Most of the coins affected are common every day coins you would find in pocket change but I am a bit concerned about the buffalo nickels and half dollars.

Since these coins are stored in whitman books do I need to buy new books since these books were "contaminated" ???

What else is in the safe?

Market Harmony wrote:What else is in the safe?

Other coins.. Some in envelopes others are proofs and mint sets in their respective holders

If you don't keep the safe's contents above the dew point, dew will form on the cardboard, and wet cardboard will corrode your coins.

put some silica gel in the safe.buy some verdigone to clean your infected coins.

jasmatk wrote:put some silica gel in the safe.buy some verdigone to clean your infected coins.

Okay seems reasonable. Thanks for the help guys. Should I buy new coin books to replace the ones that had the infected coins?

Thanks for the reminder. I need to get some desiccant packets!!!

http://www.walmart.com/ip/FG01K-DampRid-Refillable-Moisture-Absorber-10.5-oz./15033112

Stuff is cheap, can be bought most anywhere & works great.

HH