Color
Colorless, Yellow, Brown, Green, Colorless, Green, Yellow, Red, Reddish, Brown
White, Colorless, Blue, Red, Green, Yellow, Violet
Fracture
Brittle, Metallic, Brittle, Metallic
Not Available
Chemical Composition
Ca(Mg,Al)3(Al3Si)O10(OH)2
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)