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Calcite
Calcite

Polyhalite
Polyhalite



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Calcite
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Calcite and Polyhalite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Soluble
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.67-2.73
2.78
1.5 Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Brittle
1.6 Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
Perfect on {10 1 }; parting on {010}
1.7 Mohs Hardness
3
3.5
1.8 Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
Not Available

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.

  • Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
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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 and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 2.78 whereas that of Polyhalite is 2.78.

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