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Alunite and Emerald Physical Properties


Emerald and Alunite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Soluble   
Not Available   

Durability
Not Available   
Hard   

Specific Gravity
2.6-2.9   
2.67-2.78   

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

Cleavage
On {0001}, perfect   
Imperfect on the [0001]   

Mohs Hardness
3.5-4   
7.5-8   

Chemical Composition
KAl3(SO4)2(OH)6   
Be3Al2SiO6   

Optical Properties >>
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Alunite and Emerald Chemical Formula

While comparing Alunite and Emerald 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 Emerald chemical formula.

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Alunite and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.

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