Colorless, Blue, Violet, White, Brown, Colorless, Blue, Violet, White, rose, Brown, gray, Colorless, White, Violet, gray, Colorless, White, Violet, gray
Yellow, Brown, Black, Colorless, White, Brownish
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references