Mystery Tile

I found this at the very first flea market/antique show I ever went to. The only thing I know about it is the man who sold it to me said it came from an old table. The table wasn't around, just the tile. There's no markings on it at all. If anyone could tell me anything about it, I'd love to know it's history, if there is one! It's very heavy and the edges are chipped. The back looks like it was glued to something. The edges are smooth, and the back has a slight pattern like that of a file. I have no idea what category to place this tile, so I chose Art Deco for lack of a better choice.