White, Blue, Yellow, Brown, Green, Brownish, Greenish, gray
Colorless, White, Yellow, Green, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet
Gemstones (2009), Flexible Flexible fragments.
Uneven, Brittle, Uneven, Brittle, Uneven
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(K,Na)Ca4Si8O20(F,OH)•8(H2O)