Greenish, White, White, gray, Greenish, Reddish, White, gray, Greenish, Green, gray, White, gray, Greenish, Green, gray
Yellow, Green, Blue, Violet
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Not Available
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2O 3Ulrich Henn and Claudio C.