It's a piece of stained glass, used as a window valance, only $10!
A lady who is a stained glass artist gets these pieces from the glass factory, she said that this is how they roll out of the press, hence the irregular bottom shape. I plan on getting more of these from her when she has more of them. She also suggested putting some decorative beads on the hanging wire to dress it up a bit. Can't wait to see what other treasures I'll find this year!