Thanks for the welcome! There's no documentation that I know of. The frame does seem to be made of plaster or a similar material. I don't know if the other mirror was sold as a matching pair with this one or not. Yeah, someone lived in the house after Al Capone and I think those people are who the mirror actually belonged to. The guy who owns this mirror said that his sister sold the other mirror many years back for $5,000. I really doubt she got that much, I think this guy is getting his facts mixed up. I just wanted to post it here and get some expert opinions about it so I can get back to the guy and let him know. So what would you guys value the mirror at just as it is, unconfirmed if it was in the mansion?