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Cuprite
Cuprite

Polyhalite
Polyhalite



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Cuprite
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Polyhalite

Cuprite and Polyhalite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

5.85-6.152.78
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal

Cleavage

Fair in four directions forming octahedrons
Perfect on {10 1 }; parting on {010}

Mohs Hardness

3.5-43.5
2 10
👆🏻

Chemical Composition

Cu 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
K2Ca2Mg(SO4)4·2H2O

Cuprite and Polyhalite Chemical Formula

While comparing Cuprite 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 Cuprite and Polyhalite chemical formula.

  • Chemical formula of Cuprite- Cu 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Cuprite and Polyhalite Specific Gravity

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