Yellow, Brownish, Reddish, Green, Brownish, Yellow, Green, Yellow, Red
Colorless, White, Yellow, White, Greenish, gray, Brown, Colorless, Yellow
(Fe+++,Al)25(PO4)17O6(OH)12•75(H2O)
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references