White, Colorless, Blue, Red, Green, Yellow, Violet
White, Colorless, Yellow, Green, Blue, Reddish, Brown, Red, Brown
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)
BaSO4