White, Colorless, Blue, Red, Green, Yellow, Violet
White, Colorless, Blue, Red, Green, Yellow, Violet
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Not Available
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)
BeAl 2 O 4