Green, Black, White, Grey, Green, Black, White, Grey, Green, Black, gray, Black, Green, Black, gray, Black
Colorless, White, Brownish, Reddish, Black, Brownish, Black, Colorless, gray, White, Reddish, Brown
Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery
Uneven
Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
Na 3AlF 6Ulrich Henn and Claudio C.
TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references