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Anhydrite and Iolite Physical Properties


Iolite and Anhydrite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.90-2.98   
2.6-2.7   

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

Cleavage
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.   
3,1   

Mohs Hardness
3.5   
7-7.5   

Chemical Composition
CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references   
Mg2Al4Si5O18   

Optical Properties >>
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Anhydrite and Iolite Chemical Formula

While comparing Anhydrite 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 Anhydrite and Iolite chemical formula.

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Anhydrite and Iolite Specific Gravity

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

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