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