Colorless, Green, Black, Brown, Red, Greenish, Yellow, gray
Green, Greenish, Blue, Red
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Not Available
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
SiO 2Arthur Thomas , Gemstones (2009)