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Hardystonite and Iolite Physical Properties


Iolite and Hardystonite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.396-3.443   
2.6-2.7   

Fracture
Brittle, Metallic   
Not Available   

Cleavage
[001] good, [100] and [110] fair   
3,1   

Mohs Hardness
3-4   
7-7.5   

Chemical Composition
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)   
Mg2Al4Si5O18   

Optical Properties >>
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Hardystonite and Iolite Chemical Formula

While comparing Hardystonite and Iolite 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 Hardystonite and Iolite chemical formula.

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Hardystonite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hardystonite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hardystonite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Hardystonite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.

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