Greenish, White, White, gray, Greenish, Reddish, White, gray, Greenish, Green, gray, White, gray, Greenish, Green, gray
Colorless, White, Yellow, Green, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Uneven, Brittle, Uneven, Brittle, Uneven
Perfect on {001}, very good on {010}, imperfect on {110}
Perfect on {001}, imperfect on {110}
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
(K,Na)Ca4Si8O20(F,OH)•8(H2O)