USA, Southern and central Africa, green, blue, China, India, USA, Italy, green, blue, China, India, USA, Italy
Afghanistan, Brazil, Southern and central Africa, Madagascar, Russia, USA, Zimbabwe
Uneven, Uneven, Gemstones of the world (2001) More from other references
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)