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Obsidian
Smithsonite
Smithsonite and Obsidian Physical Properties


Physical Properties
Tenacity
-  
Brittle  
Solubility
-  
-  
Durability
-  
-  
Specific Gravity
2.35-2.60  
4.00-4.65  
Fracture
Conchoidal, ConchoidalWalter Schumann  
Uneven, Sub-Conchoidal  
Cleavage
None  
Perfect on [1011]  
Mohs Hardness
5-5.5  
5-5.5  
Chemical Composition
SiO2  
ZnCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references  
Optical Properties >>
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Compare Gems for Sagittarius

Gems for Sagittarius

Gems for Sagittarius

Compare Gems for Sagittarius

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