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Grandidierite and Alexandrite Physical Properties


Alexandrite and Grandidierite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.85-3.00   
3.69-3.81   

Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven   
Not Available   

Cleavage
Perfect   
1,1 ; 3,2.   

Mohs Hardness
7.5   
8.5   

Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.   
BeAl 2 O 4   

Optical Properties >>
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Grandidierite and Alexandrite Chemical Formula

While comparing Grandidierite and Alexandrite 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 Grandidierite and Alexandrite chemical formula.

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Grandidierite and Alexandrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Grandidierite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.

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Green Gemstones


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