Colorless, Green, Black, Brown, Red, Greenish, Yellow, gray
White, Colorless, Blue, Red, Green, Yellow, Violet
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Not Available
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)