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Pyromorphite
Simpsonite
Simpsonite and Pyromorphite Physical Properties


Physical Properties
Tenacity
Brittle  
-  
Solubility
-  
-  
Durability
-  
-  
Specific Gravity
6.5-7.1  
-9999  
Fracture
Uneven, Conchoidal  
Conchoidal  
Cleavage
Imperfect- [10 1 1]  
None  
Mohs Hardness
3.5-4  
7-7.5  
Chemical Composition
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)  
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.  
Optical Properties >>
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