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