From the Uluguru Mountains of Tanzania comes this striking piece of sunstone featuring a prismatic or iridescent display of rainbow colors. This type of sunstone was declared a new gemstone in 1989, and can be found in only a few places in the world. Our 1” thick polished blocks stand upright on flat surfaces and are made from a superior cast method for clarity, depth and realism. The print is an artisan Giclee and has been enlarged for a superb viewing experience. Makes a stunning showpiece on shelf, desk, table! Also, a great gift for any occasion. This block can be turned any which way and comes in several shapes and sizes.