Green, Yellow, Colorless, Grey, Brown, White, Red
White, Blue, Yellow, Brown, Green, Brownish, Greenish, gray
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
Gemstones (2009), Flexible Flexible fragments.
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references