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Cordierite
Cordierite

Nepheline
Nepheline



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Cordierite
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Nepheline

Cordierite and Nepheline Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
2.57-2.66
Subconchoidal, Conchoidal
Fair on {100}, poor on {001} and {010}
7-7.5
Mg2Al4Si5O18
 
-
-
-
2.55-2.65
Subconchoidal, Conchoidal
[1010] Poor
5-6
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Cordierite and Nepheline Chemical Formula

While comparing Cordierite 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 Cordierite and Nepheline chemical formula.

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Cordierite and Nepheline Specific Gravity

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