Russia, Brazil, Madagascar, USA, Russia, Brazil, Yellow, Madagascar, Namibia, USA, Russia, Brazil, Yellow, Madagascar, Namibia, USA
Afghanistan, Southern and central Africa
Not Available
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Not Available
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.