Cruising through catalogs the other day and I saw almost this exact same ornament (the only difference was the color of the middle shell) for 25.00 but shipping and handling. Well, of course being crafty I said, "Dude, I can so make this!" and that's just what I did and I think I did it better!
My whole piece cost about 7.00. I am going to hang it to where the sun hits the crystal and I can have a rainbow at my house at all times.
I might make some other with different shells for the back yard.
Here is the listing for the one in the catalog. http://www.victoriantradingco.com/item/30-or-3028133/100101100/by-the-seashore-summer-ornament
And here's mine.