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Corundum and Sodalite Physical Properties


Sodalite and Corundum Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
insoluble   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
3.90-4.05   
2.15-2.40   

Fracture
Uneven, Uneven, Gems, Difficult, Fibrous   
Conchoidal, Uneven, UnevenArthur Thomas, Brittle   

Cleavage
None – parting in 3 directions   
Poor on {110}   

Mohs Hardness
9   
5-6   

Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)   
Na8Al6Si6O24Cl2   

Optical Properties >>
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Corundum and Sodalite Chemical Formula

While comparing Corundum and Sodalite 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 Corundum and Sodalite chemical formula.

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Corundum and Sodalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.

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