What type of damage is this?

Seems like water damage? I think I can see some nickel peeking through on the relief but I can't see any on the edge. Maybe a combo of water damage and a relatively light nickel-clad layer? I've seen other quarters with a dark grey, almost black, layer of damage on either side, might be a related type of damage? Looks interesting.

1994 - P

 

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Environmental damage looks like its been in some dirt for quite a time-only worth 25 cents.

 

Yep!! Looks like it's had a mud bath!!! Probably found by someone detecting!!!

 

Washing machine. In pants/jacket pocket.

 

Awesome feedback, thanks everyone!

 

Long eposure to the type of dirt, soil, sand, clay and the other elements will determine what color the clad which is made of Cupro-Nickel will turn to.

Here are many examples from my metal detected finds..


Nickels are also Cupro-Nickel and can suffer the same fate

 

yeah I get folks coming to me with those thinking they have a GREAT error find. I hate breaking their hearts, but alas folks on cointalk don't get ALL the fun.

 

"Peeking through the surface rust" is a more accurate assessment.

 

Those are some excellent reference points, thanks for the useful pics @paddyman98. Yeah, they're technically gross but look at the bright rust color on that 1957? Jefferson nickel in the top right of image #3, very cool. Kind of like going to a very old town in the middle of nowhere and imagining what the lives of the people that lived in those dilapidated buildings would have been like. What a pleasure to experience the other side of the collecting equation.

 

yes, to me it's NOT all about coins, it's the hunt, history and friends along the way. (finding a gold coin along the way wouldn't hurt nothing though)

 

ED or environmental damage caused by exposure to the elements.

Welcome to CT.

 

Corrosion on copper-nickel coins is often black, but it can also be tan or brown.