Greenish, White, White, gray, Greenish, Reddish, White, gray, Greenish, Green, gray, White, gray, Greenish, Green, gray
Green, Black, White, Grey, Green, Black, White, Grey, Green, Black, gray, Black, Green, Black, gray, Black
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.