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Emerald and Polyhalite Physical Properties


Polyhalite and Emerald Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Soluble   

Durability
Hard   
Not Available   

Specific Gravity
2.67-2.78   
2.78   

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

Cleavage
Imperfect on the [0001]   
Perfect on {10 1 }; parting on {010}   

Mohs Hardness
7.5-8   
3.5   

Chemical Composition
Be3Al2SiO6   
Not Available   

Optical Properties >>
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Emerald and Polyhalite Chemical Formula

While comparing Emerald and Polyhalite 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 Emerald and Polyhalite chemical formula.

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Emerald and Polyhalite Specific Gravity

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

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