Yellow, Greenish, Brownish, Colorless, White, gray, Yellow, Green, Blue, Violet, Blue, Colorless, Green, gray, Yellow, Blue, Colorless, Green, gray, Yellow, orange
White, Colorless, Blue, Red, Green, Yellow, Violet
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Not Available
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)