Green, Black, White, Grey, Green, Black, White, Grey, Green, Black, gray, Black, Green, Black, gray, Black
Colorless, Yellow, Brown, Green, Colorless, Green, Yellow, Red, Reddish, Brown
Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery
Brittle, Metallic, Brittle, Metallic
Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
Ca(Mg,Al)3(Al3Si)O10(OH)2