All Copper Quarter?

Hello, I have no experience with quarters, but my friend today showed me this one he found. It's a 1991 P Quarter, except it looks like it is all copper. Attached are some photos, and help is appreciated!

Thank you!

 

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I don't think it's an error... It just looks like it had a hard life. Maybe spent some time in the ground.

 

Ditto .
rzage

 

I agree! A type of oxidization.

 

dirty and worn

 

thin clad layer at best, but more likely worn as consensus seems to say

 

probably a metal detecting coin.

Spend it.

 

Weak outter clad coating. I've seen them before and the prices vary depending on condition.

You can probably get a couple of bucks for it on Ebay.

Ribbit

 

This quarter is simply discolored. FYI, there's no such thing as "weak cladding". You can have a thin clad layer, but you'll never be able to tell because it never becomes translucent. So copper cannot "bleed through".

 

This is a normal coin a missing clad layer you would know if you had one here is a good example of one.
JC

 

You can tell by the edge. It shows the copper layer underneath. But the rest is environmental damage as stated above.

 

I need help uploading pictures