Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
4.28-4.425.50-5.90
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
Distinct on [010] and [100] poor on [101]
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
5-5.54
2
10
👆🏻
Chemical Composition
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)