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