Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
Afghanistan, Brazil, Southern and central Africa, Madagascar, Russia, USA, Zimbabwe
Green, Blue, Yellow, Red, Brown, Blue
Colorless, Blue
Not Available
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)