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Alexandrite and Bertrandite Physical Properties


Bertrandite and Alexandrite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.69-3.81   
2.59-2.60   

Fracture
Not Available   
Brittle, Metallic, Brittle, Metallic   

Cleavage
1,1 ; 3,2.   
{001} Perfect, {110} Distinct, {101} Distinct   

Mohs Hardness
8.5   
6-7   

Chemical Composition
BeAl 2 O 4   
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)   

Optical Properties >>
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Alexandrite and Bertrandite Chemical Formula

While comparing Alexandrite and Bertrandite 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 Alexandrite and Bertrandite chemical formula.

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Alexandrite and Bertrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alexandrite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.

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