Colorless, Yellow, White, Colorless, White
Colorless, Yellow, Brown, Green, Colorless, Green, Yellow, Red, Reddish, Brown
Not Available
Brittle, Metallic, Brittle, Metallic
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Ca(Mg,Al)3(Al3Si)O10(OH)2