I bought some coins today at an antique shop and the one i bought because it was so strange looking. It's a 1970 s proof quarter that has a gold sheen to it. The back is completely gold looking but the front has an inner "circle" that's gold looking. there is also a silver streak through the front "circle" I'm going to post pictures as soon as my camera battery charges but does anyone know if anything like this exists or what it could possibly be?