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Microcline
Microcline

Polyhalite
Polyhalite



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Microcline
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Polyhalite

Microcline and Polyhalite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

2.55-2.632.78
1 7.18
👆🏻

Fracture

Uneven
Conchoidal

Cleavage

{001} Perfect, {010} Good
Perfect on {10 1 }; parting on {010}

Mohs Hardness

6-6.53.5
2 10
👆🏻

Chemical Composition

KAlSi 3O 8Arthur Thomas , Gemstones (2009)
K2Ca2Mg(SO4)4·2H2O

Microcline and Polyhalite Chemical Formula

While comparing Microcline 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 Microcline and Polyhalite chemical formula.

  • Chemical formula of Microcline- KAlSi 3O 8Arthur Thomas , Gemstones (2009)
  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

Microcline and Polyhalite Specific Gravity

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