Brown, Yellow, White, Brown, Greenish, Yellow, White
Colorless, Blue, Violet, White, Brown, Colorless, Blue, Violet, White, rose, Brown, gray, Colorless, White, Violet, gray, Colorless, White, Violet, gray
Uneven, Even, Yellow, White
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
K(Mg,Fe++)3[AlSi3O10(OH,F)2
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references