Sapyx ✭✭✭✭✭

As someone whose "main collection" is all coins worldwide by type, ancient through to modern, my "side collection" would be "anything in my collection that isn't a coin&… (View Post)

The anti-acetone crowd like to cite a few research papers showing that, under certain extreme conditions, acetone in contact with copper can break down and form acetic acid, which can cause corrosion… (View Post)

The most widely available "coin catalogues for ancients" are the Sear catalogues; they come in several volumes (5 for Roman, 2 for Greek, and one each for Byzantine and Roman Provincial). T… (View Post)

Greenish deposits can form on silver coins - but it usually requires some kind of unusual chemical environment. Perhaps somewhere with acid fumes, or getting buried in a certain kind of soil. I'… (View Post)

As an outsider looking in (I'm from Australia), my main "complaint" about US coinage in general is that it's way too verbose. Too wordy. The coin the OP has posted is not guilty o… (View Post)