Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
6.5-7.13.13-3.75
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Subconchoidal, Uneven, Conchoidal
Cleavage
Imperfect- [10 1 1]
Poor on {100}
Mohs Hardness
3.5-46
2
10
👆🏻
Chemical Composition
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
(Mg,Fe2+ ) 9(SiO 4) 4(F,OH)) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references