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Corundum and Allanite Physical Properties


Allanite and Corundum Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
insoluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.90-4.05   
3.40-4.20   

Fracture
Uneven, Uneven, Gems, Difficult, Fibrous   
Not Available   

Cleavage
None – parting in 3 directions   
Not Available   

Mohs Hardness
9   
Not Available   

Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)   
Not Available   

Optical Properties >>
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Corundum and Allanite Chemical Formula

While comparing Corundum and Allanite 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 Allanite chemical formula.

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Corundum and Allanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Allanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Allanite Optical Properties during the identification of gemstone. Specific gravity of Corundum is 3.40-4.20 whereas that of Allanite is 3.40-4.20.

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