Grey, White, Colorless, gray, Pale pink, Blue
Brown, Yellow, Red, Green, Blue, gray, Violet
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, Brittle
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Not Available