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Sapphire and Spinel Physical Properties


Spinel and Sapphire Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
insoluble   
none   

Durability
Not Available   
Not Available   

Specific Gravity
3.95-4.03   
3.64-3.66   

Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)   
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
None, but may exhibit parting   
None, but may exhibit slight parting   

Mohs Hardness
9   
8   

Chemical Composition
Al 2 O 3   
MgAl2O4   

Optical Properties >>
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Sapphire and Spinel Chemical Formula

While comparing Sapphire and Spinel 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 Spinel chemical formula.

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Sapphire and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Spinel Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 3.64-3.66 whereas that of Spinel is 3.64-3.66.

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