White, Blue, Yellow, Brown, Green, Brownish, Greenish, gray
Greenish, White, White, gray, Greenish, Reddish, White, gray, Greenish, Green, gray, White, gray, Greenish, Green, gray
Gemstones (2009), Flexible Flexible fragments.
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)