Yellow, Brownish, Reddish, White, Colorless, Blue, Green, Violet, pink
Colorless, Yellow, Brown, Green, Red, Reddish
Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
Brittle, Metallic
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Ca(Mg,Al)3(Al3Si)O10(OH)2