Found an old coin stash I had as a child while cleaning out my fathers house. Quick question, I know that the coin won't make me rich; I would like to know if this is pvc and damage? If so this could be my 1st chance to do a dip! Or... is it just a copper patina? The past 30 plus years it's been a loose coin. Who knows before that though...
Def don't dip! That is verdigris, natural copper patina. The Statue of Liberty is coated in green verdigris. It is usually a mixture of basic copper carbonate and copper II acetate, but sometimes depending on the situation the copper has been in may have some other copper compounds.
It's kind of one of those things that the only way to explain it is to see it. Once you have a coin that does have PVC damage you'll be able to tell a difference from that and the environmental damage.
