Color
Reddish, Greenish, White, Red, Yellow, Green, Grey, Blue, Brown, Colorless, gray, orange
White, Colorless, Blue, Red, Green, Yellow, Violet
Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)