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Corundum and Carnelian Physical Properties


Carnelian 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   
2.58-2.64   

Fracture
Uneven, Uneven, Gems, Difficult, Fibrous   
Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)   

Cleavage
None – parting in 3 directions   
Absent   

Mohs Hardness
9   
6.5-7   

Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)   
SiO2   

Optical Properties >>
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Corundum and Carnelian Chemical Formula

While comparing Corundum and Carnelian 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 Carnelian chemical formula.

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Corundum and Carnelian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Corundum and Carnelian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Corundum and Carnelian Optical Properties during the identification of gemstone. Specific gravity of Corundum is 2.58-2.64 whereas that of Carnelian is 2.58-2.64.

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