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Alunite and Grossular Physical Properties


Grossular 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   
3.55-3.73   

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

Cleavage
On {0001}, perfect   
none   

Mohs Hardness
3.5-4   
7-7.5   

Chemical Composition
KAl3(SO4)2(OH)6   
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)   

Optical Properties >>
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Alunite and Grossular Chemical Formula

While comparing Alunite and Grossular 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 Grossular chemical formula.

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Alunite and Grossular Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Grossular Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Grossular Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.55-3.73 whereas that of Grossular is 3.55-3.73.

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