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Sillimanite
Sillimanite

Nepheline
Nepheline



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Sillimanite
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Nepheline

Sillimanite and Nepheline Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
 
-
-
-
2.55-2.65
Subconchoidal, Conchoidal
[1010] Poor
5-6
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Sillimanite and Nepheline Chemical Formula

While comparing Sillimanite 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 Sillimanite and Nepheline chemical formula.

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Sillimanite and Nepheline Specific Gravity

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