White, Colorless, Blue, Red, Green, Yellow, Violet
White, White, Colorless, Red, Reddish
Not Available
Uneven, Brittle, Metallic, Gemstones (2009)
Not Available
Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references