Colorless, Yellow, Brown, Green, Colorless, Green, Yellow, Red, Reddish, Brown
White, Colorless, Greenish, White, Colorless, gray, pink, Greenish, White, Greenish, Reddish
Brittle, Metallic, Brittle, Metallic
Uneven, Subconchoidal, Uneven, Subconchoidal, Conchoidal, Brittle
Ca(Mg,Al)3(Al3Si)O10(OH)2
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references