Black, Brownish, White, Brown
Yellow, Brownish, Reddish, White, Colorless, Blue, Green, Yellow, Green, Yellow, Brownish, Reddish, White, Colorless, Blue, Green, Yellow, Green, Violet, pink, Yellow, Green, Violet, pink
Reddish, Black
White, Green, White, Green
Conchoidal, Brittle
Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)