Colorless, Yellow, Brown, Green, Colorless, Green, Yellow, Red, Reddish, Brown
Yellow, Brownish, Reddish, Green, Brownish, Yellow, Green, Yellow, Red
Brittle, Metallic, Brittle, Metallic
Uneven
Ca(Mg,Al)3(Al3Si)O10(OH)2
(Fe+++,Al)25(PO4)17O6(OH)12•75(H2O)