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Vanadinite
Sardonyx
Sardonyx and Vanadinite Physical Properties


Physical Properties
Tenacity
Brittle  
-  
Solubility
-  
-  
Durability
-  
-  
Specific Gravity
6.8-7.1  
2.55-2.70  
Fracture
Uneven, Conchoidal  
-  
Cleavage
None  
None  
Mohs Hardness
3-4  
6.5-7  
Chemical Composition
C20H36  
SiO 2Ulrich Henn and Claudio C.  
Optical Properties >>
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