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Corundum
Corundum

Sodalite
Sodalite



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Corundum
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Sodalite

Corundum and Sodalite Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
insoluble
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.90-4.052.15-2.40
Amber
1 7.18
1.5 Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
1.6 Cleavage
None – parting in 3 directions
Poor on {110}
1.7 Mohs Hardness
95-6
Amber
2 10
1.8 Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Na8Al6Si6O24Cl2

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.

  • Chemical formula of Corundum- Al 2O 3Arthur Thomas , Gemstones (2009)
  • Chemical formula of Sodalite- Na8Al6Si6O24Cl2

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.