Colorless, White, gray, Brownish, Greenish
Greenish, White, White, gray, Greenish, Reddish, White, gray, Greenish, Green, gray, White, gray, Greenish, Green, gray
Micaceous, Brittle
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
KAl 2AlSi 3O 10(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)