Black, Green, Black, Green, Black, Green, gray, Black, Green, gray
Yellow, Brownish, Reddish, White, Colorless, Blue, Green, Yellow, Green, Yellow, Brownish, Reddish, White, Colorless, Blue, Green, Yellow, Green, Violet, pink, Yellow, Green, Violet, pink
Not Available, Not Available, gray, Green
White, Green, White, Green
Uneven, Brittle, Metallic, Brittle, Metallic
Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic
NaNa2(Fe++4Fe+++)Si8O22(OH)2
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)