Austria, Zimbabwe, Australia
Afghanistan, Pakistan, Burma, Brazil, Madagascar, USA, Canada, Russia, Madagascar, Brazil, Canada, Mexico, Madagascar, Brazil, Canada, Mexico
Red, Brown, Violet, Red, Brown
Colorless, pink
Uneven, Subconchoidal, Conchoidal, Brittle
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)