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Sapphire and Nepheline Physical Properties


Nepheline 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   
2.55-2.65   

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

Cleavage
None, but may exhibit parting   
[1010] Poor   

Mohs Hardness
9   
5-6   

Chemical Composition
Al 2 O 3   
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.   

Optical Properties >>
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Sapphire and Nepheline Chemical Formula

While comparing Sapphire and Nepheline 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 Nepheline chemical formula.

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Sapphire and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sapphire and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.

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