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Coral
Coral

Polyhalite
Polyhalite



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Coral
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Polyhalite

Coral and Polyhalite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

2.60-2.702.78
1 7.18
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Fracture

Irregular
Conchoidal

Cleavage

None
Perfect on {10 1 }; parting on {010}

Mohs Hardness

3-43.5
2 10
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Chemical Composition

CaCO 3Ulrich Henn and Claudio C.
K2Ca2Mg(SO4)4·2H2O

Coral and Polyhalite Chemical Formula

While comparing Coral 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 Coral and Polyhalite chemical formula.

  • Chemical formula of Coral- CaCO 3Ulrich Henn and Claudio C.
  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Coral and Polyhalite Specific Gravity

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