I found these (and several similar-looking coins) in a partial State Quarter album which had separate slots for regular and silver proof coins. They're definitely the silver proofs (no clad edges). Is it atypical to find these toned?
Yes, since they were put in albums, they will probably tone more easily than if left in the mint packaging because they are exposed to more elements in the album. The toning on those quarters look as if they may have been touched or wiped (with something), since the toning didn't start toward the edge of the coins where they come in contact with the album.
Or the toning could simply be caused by hydrogen sulfide gas in the atmosphere. If the coins has been wiped, there would most likely be evidence in the form of hairlines on the surface of the coin.
Thanks for the replies. I think these coins were probably handled pretty carefully, but I can't say for certain, since I wasn't the one who removed them from their set. I realize that these coins aren't especially valuable in and of themselves. Does this toning add any premium, or detract from the value, or really make no difference?
Toning of this type is pretty neutral although you will find that most modern proof collectors want blast white untoned examples.
