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Sapphire and Polyhalite Physical Properties


Polyhalite and Sapphire Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
insoluble   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.95-4.03   
2.78   

Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)   
Conchoidal, Brittle   

Cleavage
None, but may exhibit parting   
Perfect on {10 1 }; parting on {010}   

Mohs Hardness
9   
3.5   

Chemical Composition
Al 2 O 3   
Not Available   

Optical Properties >>
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Sapphire and Polyhalite Chemical Formula

While comparing Sapphire and Polyhalite 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 Polyhalite chemical formula.

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Sapphire and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.78 whereas that of Polyhalite is 2.78.

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