Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.28-4.423.85-3.94
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
Distinct on [010] and [100] poor on [101]
{010} Good, {100} Distinct
Mohs Hardness
5-5.55-5.5
2
10
👆🏻
Chemical Composition
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)