Green, Black, White, Grey, Green, Black, White, Grey, Green, Black, gray, Black, Green, Black, gray, Black
Green, Greenish, Blue, Red
Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery
Not Available
Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
SiO 2Arthur Thomas , Gemstones (2009)