White, Colorless, Blue, Red, Green, Yellow, Violet
White, Pale pink, Colorless, pink, Yellow
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Not Available
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)
Mn2+ BO 2(OH)Anthony et al , Handbook of mineralogy (2001)