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Polyhalite
Polyhalite

Orthoclase
Orthoclase



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Polyhalite
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Orthoclase

Polyhalite and Orthoclase Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

Soluble
-

Durability

-
-

Specific Gravity

2.782.54-2.61
1 7.18
👆🏻

Fracture

Conchoidal
Uneven

Cleavage

Perfect on {10 1 }; parting on {010}
Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.

Mohs Hardness

3.56
2 10
👆🏻

Chemical Composition

K2Ca2Mg(SO4)4·2H2O
KAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Polyhalite and Orthoclase Chemical Formula

While comparing Polyhalite and Orthoclase 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 Orthoclase chemical formula.

  • Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
  • Chemical formula of Orthoclase- KAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Polyhalite and Orthoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Orthoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Orthoclase Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.54-2.61 whereas that of Orthoclase is 2.54-2.61.