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Sapphire and Obsidian Physical Properties


Obsidian and Sapphire Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
insoluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.95-4.03   
2.35-2.60   

Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)   
Conchoidal, ConchoidalWalter Schumann, Conchoidal   

Cleavage
None, but may exhibit parting   
Not Available   

Mohs Hardness
9   
5-5.5   

Chemical Composition
Al 2 O 3   
Not Available   

Optical Properties >>
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Sapphire and Obsidian Chemical Formula

While comparing Sapphire and Obsidian physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Sapphire and Obsidian chemical formula.

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Sapphire and Obsidian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Obsidian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Obsidian Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.35-2.60 whereas that of Obsidian is 2.35-2.60.

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