Crystal Sun Catcher Prism Fortune Rainbow Diameter: Approximately 4.5cm Material: Glass Images 1, 2, and 3 are borrowed from the sales site. (Defective) Although new, there are scratches. It's difficult to see, but please check images 5 and 6. A suncatcher is an interior accessory that refracts sunlight to create rainbow-colored light. Also known as a "rainbow maker," it is popular in the West as an item that brings good luck.