USA, Mexico, Austria, India, Southern and central Africa, Australia, Argentina, Mexico, Spain, Argentina, Mexico, Spain
Afghanistan, Pakistan, Burma, Brazil, Madagascar, USA, Canada, Russia, Madagascar, Brazil, Canada, Mexico, Madagascar, Brazil, Canada, Mexico
Scorpio, Leo, Scorpio, Leo, Scorpio, Leo
Taurus
Uneven, Conchoidal, Conchoidal to uneven, Brittle
Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)