White, Colorless, Blue, Red, Green, Yellow, Violet
Yellow, Red, White, White, Colorless, Blue, Red, Green, Yellow, pink, Black, Blue, Brown
Not Available
Courage, Love, Healing, Protection
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)
SiO2