If the coin has no mint luster at all, it's been played with, and it is not a mint error.
Coins that look dark, grey, etc, have been in either a chemical bath, or could have been in one of many different types of liquid that would dull it, or plate it with a solution.
We can't always figure out exactly what happened to a coin post-mint Striking, but it's easier to know that the coin wasn't struck as a mint error.
A scan of both sides, clear and crisp, would also be helpful....
Retired Collector & Dealer in Major Mint Error Coins & Currency since the 1960's.Co-Author of Whitman's "100 Greatest U.S. Mint Error Coins", and the Error Coin Encyclopedia, Vols., III & IV. Retired Authenticator for Major Mint Errors for PCGS. A 50+ Year PNG Member.A full-time numismatist since 1972, retired in 2022.
A dull gray side could be missing the "clad" layer. Keep in mind, quarters are copper core with nickel plating, essentially. Like Fred said, a picture would help. I sent one in to PCGS that Fred even bid on via ebay ( made me feel special). I thought it was missing clad but it came back as a "sintered" planchet. MS65 Kentucky.... it was kinda cool, I think I called it the BLACK STALLION in my ebay ad., and it sold for about abucktwentyfive which was a profit YES, it's an important find if either of those "errors" got past the mint. Not a huge find, but significant !
Comments
played with, and it is not a mint error.
Coins that look dark, grey, etc, have been
in either a chemical bath, or could have been
in one of many different types of liquid that
would dull it, or plate it with a solution.
We can't always figure out exactly what happened
to a coin post-mint Striking, but it's easier to
know that the coin wasn't struck as a mint error.
A scan of both sides, clear and crisp, would also
be helpful....
A dull gray side could be missing the "clad" layer.
Keep in mind, quarters are copper core with nickel plating, essentially.
Like Fred said, a picture would help.
I sent one in to PCGS that Fred even bid on via ebay ( made me feel special). I thought it was missing clad but it came back as a "sintered" planchet. MS65 Kentucky.... it was kinda cool, I think I called it the BLACK STALLION in my ebay ad., and it sold for about abucktwentyfive which was a profit
YES, it's an important find if either of those "errors" got past the mint. Not a huge find, but significant !
Got pics ?
Joe
``https://ebay.us/m/KxolR5