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Calcite
Calcite

Polyhalite
Polyhalite



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Calcite
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Polyhalite

Calcite and Polyhalite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.67-2.73
Conchoidal
Perfect on [10 1 1] three directions with angle of 74° 55
3
CaCO 3Ulrich Henn and Claudio C.
 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O

Calcite and Polyhalite Chemical Formula

While comparing Calcite 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 Calcite and Polyhalite chemical formula.

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Calcite and Polyhalite Specific Gravity

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