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Vivianite and Nepheline Physical Properties


Nepheline and Vivianite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.64-2.70   
2.55-2.65   

Fracture
(e.g. graphite).   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
{010} Perfect   
[1010] Poor   

Mohs Hardness
Not Available   
5-6   

Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.   
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.   

Optical Properties >>
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Vivianite and Nepheline Chemical Formula

While comparing Vivianite 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 Vivianite and Nepheline chemical formula.

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Vivianite and Nepheline Specific Gravity

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

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