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Fluorite
Fluorite

Polyhalite
Polyhalite



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Fluorite
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Polyhalite

Fluorite and Polyhalite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

slightly water soluble and in hot hydrochloric acid
Soluble

Durability

-
-

Specific Gravity

3.00-3.252.78
1 7.18
👆🏻

Fracture

Subconchoidal, Uneven, ConchoidalWalter Schumann
Conchoidal

Cleavage

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

Mohs Hardness

43.5
2 10
👆🏻

Chemical Composition

CaF2
K2Ca2Mg(SO4)4·2H2O

Fluorite and Polyhalite Chemical Formula

While comparing Fluorite 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 Fluorite and Polyhalite chemical formula.

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

Fluorite and Polyhalite Specific Gravity

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