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Polyhalite
Polyhalite

Periclase
Periclase



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Polyhalite
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Periclase

Polyhalite and Periclase Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O
 
Brittle
-
-
3.7-3.9
Conchoidal
{001} perfect; {111} imperfect, may exhibit parting on , {011}
5.5-6
MgOMichael O’Donoghue , Gems, Sixth Edition (2006)

Polyhalite and Periclase Chemical Formula

While comparing Polyhalite and Periclase 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 Polyhalite and Periclase chemical formula.

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Polyhalite and Periclase Specific Gravity

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