Colorless, Yellow, Blue, Reddish, Black, Reddish, Brown, Blue, gray, Black, Reddish, Brown, Blue, gray
Green, Yellow, Colorless, Grey, Brown, White, Red
Subconchoidal, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)