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Polyhalite
Polyhalite

Piemontite
Piemontite



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Polyhalite
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Piemontite

Polyhalite and Piemontite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
-

Durability

-
-

Specific Gravity

2.78-9999
1 7.18
👆🏻

Fracture

Conchoidal
Uneven, Splintery

Cleavage

Perfect on {10 1 }; parting on {010}
[001] good, [100] distinct

Mohs Hardness

3.56-6.5
2 10
👆🏻

Chemical Composition

K2Ca2Mg(SO4)4·2H2O
Ca2Al3(SiO4)(Si2O7)O(OH)

Polyhalite and Piemontite Chemical Formula

While comparing Polyhalite and Piemontite 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 Piemontite chemical formula.

  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
  • Chemical formula of Piemontite- Ca2Al3(SiO4)(Si2O7)O(OH)

Polyhalite and Piemontite Specific Gravity

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