White, Colorless, Blue, Red, Green, Yellow, Violet
Green, Yellow, Colorless, Grey, Brown, White, Red
Not Available
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)