Colorless, Colorless, Green, gray, pink, Yellow, Colorless, Green, gray, pink, Yellow
White, Colorless, Blue, Red, Green, Yellow, Violet
Uneven, Uneven, Gems, Sixth Edition (2006)
Not Available
(Na,K)AlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
BeAl 2 O 4