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Alunite and Feldspar Physical Properties


Feldspar and Alunite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Soluble   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.6-2.9   
2.56-2.75   

Fracture
Conchoidal, Uneven   
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)   

Cleavage
On {0001}, perfect   
two or three   

Mohs Hardness
3.5-4   
6-6.5   

Chemical Composition
KAl3(SO4)2(OH)6   
Not Available   

Optical Properties >>
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Alunite and Feldspar Chemical Formula

While comparing Alunite and Feldspar 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 Alunite and Feldspar chemical formula.

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Alunite and Feldspar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Feldspar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Feldspar Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.56-2.75 whereas that of Feldspar is 2.56-2.75.

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Red Gemstones


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