Brown, Colorless, Brown, Brownish, Black, Colorless, Green, Greenish
Yellow, Brownish, Reddish, Green, Brownish, Yellow, Green, Yellow, Red
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven
ZrO 2Arthur Thomas , Gemstones (2009)
(Fe+++,Al)25(PO4)17O6(OH)12•75(H2O)