That is GORGEOUS. Wow you did a splendid job on it. When I first looked at it, it looked like a bunch of broken glass. Then I thought it looked like those tiles that you break up and then put in that plaster stuff. I don't know what thats called. But either way...ITS BEAUTIFUL.
I love that rainbow binding your going to use. Where did you find that at do you remember? I would love to have a few yards of that. :)