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Polyhalite
Polyhalite

Bornite
Bornite



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Polyhalite
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Bornite

Polyhalite and Bornite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
-

Durability

-
-

Specific Gravity

2.785.06-5.08
1 7.18
👆🏻

Fracture

Conchoidal
Uneven, Subconchoidal, Conchoidal

Cleavage

Perfect on {10 1 }; parting on {010}
Poor on [111].

Mohs Hardness

3.53-3.25
2 10
👆🏻

Chemical Composition

K2Ca2Mg(SO4)4·2H2O
Cu5FeS4

Polyhalite and Bornite Chemical Formula

While comparing Polyhalite and Bornite 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 Bornite chemical formula.

  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
  • Chemical formula of Bornite- Cu5FeS4

Polyhalite and Bornite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Bornite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Bornite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 5.06-5.08 whereas that of Bornite is 5.06-5.08.