Colorless, Yellow, Brown, Green, Colorless, Green, Yellow, Red, Reddish, Brown
White, Green, Blue, Yellow, Brownish, Red, Blue, gray, Yellow, White
Brittle, Metallic, Brittle, Metallic
Irregular
Ca(Mg,Al)3(Al3Si)O10(OH)2
Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)