I have no idea what this is... but I LOVE it!

I just finished creating a very unique light and I had to share it with you!  Why is it so unique?  I have no idea what it's made of!  I found this "cage thing" at Canton and fell in love with the shape and the fact that it is covered in lovely rust.  At first I thought it was an old bingo ball cage, but it looks like they were all round.  Anyway, I made it into a pendant light and I think it's fabulous!

 What do you think??  Any idea what it is?  I have it listed in my Etsy shop... can't wait to see how it goes over!