Red, Reddish, Brown, Black, Yellow
White, Colorless, Blue, Red, Green, Yellow, Violet
Uneven, Splintery
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Not Available
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)