White, Colorless, Blue, Red, Green, Yellow, Violet
Colorless, Yellow, Green, gray, Black, White
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Conchoidal, Brittle
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)
KNa22(SO4)9(CO3)2Cl