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Andradite Garnet
Andradite Garnet

Polyhalite
Polyhalite



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Andradite Garnet
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Polyhalite

Andradite Garnet and Polyhalite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

3.8-3.92.78
1 7.18
👆🏻

Fracture

-
Conchoidal

Cleavage

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

Mohs Hardness

6.5-7.53.5
2 10
👆🏻

Chemical Composition

Ca3Fe3+2Si3O12
K2Ca2Mg(SO4)4·2H2O

Andradite Garnet and Polyhalite Chemical Formula

While comparing Andradite Garnet 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 Andradite Garnet and Polyhalite chemical formula.

  • Chemical formula of Andradite Garnet- Ca3Fe3+2Si3O12
  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Andradite Garnet and Polyhalite Specific Gravity

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