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Anhydrite and Gahnite Physical Properties


Gahnite 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   
4.00-4.62   

Fracture
Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal   
Conchoidal, Uneven   

Cleavage
Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.   
Indistinct parting on [111]   

Mohs Hardness
3.5   
7.5-8   

Chemical Composition
CaSO 4Michael O’Donoghue , Gems, Sixth edition (2006) More from other references   
ZnAl 2O 4Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Anhydrite and Gahnite Chemical Formula

While comparing Anhydrite and Gahnite 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 Gahnite chemical formula.

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Anhydrite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anhydrite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.

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