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Alunite and Hackmanite Physical Properties


Hackmanite 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   
2.27-2.33   

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

Cleavage
On {0001}, perfect   
Not Available   

Mohs Hardness
3.5-4   
5.5-6   

Chemical Composition
KAl3(SO4)2(OH)6   
Na 8Al 6Si 6O 24Cl 2Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Alunite and Hackmanite Chemical Formula

While comparing Alunite and Hackmanite 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 Hackmanite chemical formula.

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Alunite and Hackmanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Hackmanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Hackmanite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.27-2.33 whereas that of Hackmanite is 2.27-2.33.

Red Gemstones

Red Gemstones


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