Pakistan, Italy, Russia, China, Brazil, Switzerland, Madagascar, Austria, Canada
USA, Southern and central Africa, green, blue, China, India, USA, Italy, green, blue, China, India, USA, Italy
Reddish, Brown, Yellow, Green, Red, gray
White, Yellow
Sub-Conchoidal, Conchoidal, Brittle
Uneven, Uneven, Gemstones of the world (2001) More from other references