White, Blue, Yellow, Brown, Green, Brownish, Greenish, gray
Yellow, Brownish, Reddish, Green, Brownish, Yellow, Green, Yellow, Red
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe+++,Al)25(PO4)17O6(OH)12•75(H2O)