Here are two images of a suncatcher I made for Charley. On the left it is against a sheet; on the right against the view from the window. It has a octagonal swarovski crystal so it makes rainbows for her when the sun shines through it.
I discovered Strass/ Swarovski® Crystals (Swore-off-ski). They are made of glass with lead in, aka crystal. These flawless crystals are clearer than air or water. They refract well and make excellent rainbows; they are small and relatively cheap. The bevels are made of ordinary glass, not crystal, so refract less well.