Sugilite is an ususual gemstone from the Kalahari desert in Africa.  Classified as a rare gem in 1980, small deposits have been found in other areas of the world, but it still remains rare.  Colours can be pinkish, lilac, plum, magenta, reddish-purple and bluish-purple. It may be a uniform colour or have a mottled, veined, blotchy or layered appearance and can contain black matrix, yellowish or reddish blotches and lighter purple or white patches.  Interesting patterns can command high prices.