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Polyhalite
Polyhalite

Kutnohorite
Kutnohorite



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Polyhalite
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Kutnohorite

Polyhalite and Kutnohorite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
Soluble

Durability

-
-

Specific Gravity

2.783.12
1 7.18
👆🏻

Fracture

Conchoidal
Subconchoidal, Conchoidal

Cleavage

Perfect on {10 1 }; parting on {010}
Perfect on {10 1 1}

Mohs Hardness

3.53-4
2 10
👆🏻

Chemical Composition

K2Ca2Mg(SO4)4·2H2O
Ca(Mn,Mg,Fe)(CO3)2

Polyhalite and Kutnohorite Chemical Formula

While comparing Polyhalite and Kutnohorite 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 Kutnohorite chemical formula.

  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
  • Chemical formula of Kutnohorite- Ca(Mn,Mg,Fe)(CO3)2

Polyhalite and Kutnohorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Kutnohorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Kutnohorite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.12 whereas that of Kutnohorite is 3.12.