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Apatite and Nepheline Physical Properties


Nepheline and Apatite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.16-3.23   
2.55-2.65   

Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
[0001] indistinct, [1010] indistinct   
[1010] Poor   

Mohs Hardness
5   
5-6   

Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references   
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.   

Optical Properties >>
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Apatite and Nepheline Chemical Formula

While comparing Apatite 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 Apatite and Nepheline chemical formula.

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Apatite and Nepheline Specific Gravity

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

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