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Emerald and Nepheline Physical Properties


Nepheline and Emerald Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Hard   
Not Available   

Specific Gravity
2.67-2.78   
2.55-2.65   

Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
Imperfect on the [0001]   
[1010] Poor   

Mohs Hardness
7.5-8   
5-6   

Chemical Composition
Be3Al2SiO6   
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.   

Optical Properties >>
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Emerald and Nepheline Chemical Formula

While comparing Emerald 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 Emerald and Nepheline chemical formula.

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Emerald and Nepheline Specific Gravity

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

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