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Cordierite and Poudretteite Physical Properties


Poudretteite and Cordierite Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.57-2.66   
2.51-2.53   

Fracture
Subconchoidal, Conchoidal, Brittle   
Conchoidal, Splintery   

Cleavage
Fair on {100}, poor on {001} and {010}   
None   

Mohs Hardness
7-7.5   
5   

Chemical Composition
Mg2Al4Si5O18   
KNa 2B 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Cordierite and Poudretteite Chemical Formula

While comparing Cordierite and Poudretteite 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 Cordierite and Poudretteite chemical formula.

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Cordierite and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.

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