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Polyhalite
Polyhalite

Pectolite
Pectolite



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Polyhalite
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Pectolite

Polyhalite and Pectolite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
-

Durability

-
-

Specific Gravity

2.782.74-2.90
1 7.18
👆🏻

Fracture

Conchoidal
Uneven, Splintery

Cleavage

Perfect on {10 1 }; parting on {010}
Perfect on {100} and {001}

Mohs Hardness

3.54.5-5
2 10
👆🏻

Chemical Composition

K2Ca2Mg(SO4)4·2H2O
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Polyhalite and Pectolite Chemical Formula

While comparing Polyhalite and Pectolite 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 Pectolite chemical formula.

  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
  • Chemical formula of Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Polyhalite and Pectolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Pectolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Pectolite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.74-2.90 whereas that of Pectolite is 2.74-2.90.