Greenish, White, White, gray, Greenish, Reddish, White, gray, Greenish, Green, gray, White, gray, Greenish, Green, gray
Blue, White, Grey, Yellow, Green, Colorless, Red, gray
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Uneven, Conchoidal, Brittle
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2