I found this coin a few months ago and posted about it in the Coin roll hunting section, but didn't get any responses. It's a 1999-P penn. statehood quarter. The thing that puzzled me about it is that there is no copper showing on the rim at all, and (I know I shouldn't admit this but) I even rubbed the edge of it against my pocket knife sharpening stone and still didn't see any copper. Could it just be plated? Or is this a wrong planchet/metal error? I have been trying to figure it out for a while but I can't seem to find anything out about it. My guess is that it's probably just silver plated, but I would like to see some other people's opinions.