Afghanistan, Pakistan, Burma, Brazil, Madagascar, USA, Canada, Russia, Madagascar, Brazil, Canada, Mexico, Madagascar, Brazil, Canada, Mexico
Guatemala, Russia, Columbia, Canada, Italy
Colorless, pink
White, Red, Brown, Green, gray
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)
Splintery, UnevenArthur Thomas, Difficult, Fibrous