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Polyhalite
Polyhalite

Fluorite
Fluorite



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Polyhalite
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Fluorite

Polyhalite and Fluorite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
slightly water soluble and in hot hydrochloric acid

Durability

-
-

Specific Gravity

2.783.00-3.25
1 7.18
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Fracture

Conchoidal
Subconchoidal, Uneven, ConchoidalWalter Schumann

Cleavage

Perfect on {10 1 }; parting on {010}
Octahedral, perfect on {111}, parting on {011}

Mohs Hardness

3.54
2 10
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Chemical Composition

K2Ca2Mg(SO4)4·2H2O
CaF2

Polyhalite and Fluorite Chemical Formula

While comparing Polyhalite and Fluorite 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 Fluorite chemical formula.

  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
  • Chemical formula of Fluorite- CaF2

Polyhalite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.