Black, Green, Black, Green, Black, Green, gray, Black, Green, gray
Yellow, Greenish, Brownish, Colorless, White, gray, Yellow, Green, Blue, Violet, Blue, Colorless, Green, gray, Yellow, Blue, Colorless, Green, gray, Yellow, orange
Not Available, Not Available, gray, Green
White
Uneven, Brittle, Metallic, Brittle, Metallic
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
NaNa2(Fe++4Fe+++)Si8O22(OH)2
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references