Australia, Spain, Brazil, Germany, Australia, Spain, Brazil, Germany, Australia, Spain, Brazil
Southern and central Africa, Brazil, China, Zimbabwe, Switzerland, Zimbabwe, Switzerland
Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
Not Available
Translucent, Opaque . May be translucent when backlit on the edges.
Gemstones of the world (2001)