White, Colorless, Blue, Red, Green, Yellow, Violet
Yellow, Greenish, Brownish, Colorless, White, gray, Yellow, Green, Blue, Violet, Blue, Colorless, Green, gray, Yellow, Blue, Colorless, Green, gray, Yellow, orange
Not Available
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
SiO 2Walter Schumann , Gemstones of the world (2001)
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references