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