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Gibbsite and Sapphire Physical Properties


Sapphire and Gibbsite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
insoluble   

Durability
Not Available   
Not Available   

Specific Gravity
2.35   
3.95-4.03   

Fracture
Fibrous, Difficult, Fibrous   
Uneven, Uneven, Gems, Sixth Edition (2006)   

Cleavage
{001} Perfect   
None, but may exhibit parting   

Mohs Hardness
2.5-3   
9   

Chemical Composition
Al(OH)3   
Al 2 O 3   

Optical Properties >>
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Gibbsite and Sapphire Chemical Formula

While comparing Gibbsite and Sapphire 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 Gibbsite and Sapphire chemical formula.

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Gibbsite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.

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Grey Gemstones


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