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Nepheline
Nepheline

Alunite
Alunite



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Nepheline
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Alunite

Nepheline and Alunite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.55-2.65
Subconchoidal, Conchoidal
[1010] Poor
5-6
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6

Nepheline and Alunite Chemical Formula

While comparing Nepheline and Alunite 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 Nepheline and Alunite chemical formula.

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Nepheline and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline Vs Alunite during the identification of gemstone. Specific gravity of Nepheline is whereas that of Alunite is .