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Smithsonite
Plumbogummite
Plumbogummite and Smithsonite Physical Properties


Physical Properties
Tenacity
Brittle  
Brittle  
Solubility
-  
Soluble  
Durability
-  
-  
Specific Gravity
4.00-4.65  
4.014  
Fracture
Uneven, Sub-Conchoidal  
Uneven, Conchoidal  
Cleavage
Perfect on [1011]  
None  
Mohs Hardness
5-5.5  
4-5  
Chemical Composition
ZnCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references  
PbAl3(PO4)(SO4)(OH)6  
Optical Properties >>
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