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Oligoclase
Oligoclase

Polyhalite
Polyhalite



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Oligoclase
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Polyhalite

Oligoclase and Polyhalite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.62-2.67
Uneven
From the Greek, oligos and kasein, little cleavage.
6-6.5
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O

Oligoclase and Polyhalite Chemical Formula

While comparing Oligoclase 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 Oligoclase and Polyhalite chemical formula.

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Oligoclase and Polyhalite Specific Gravity

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