Polyhalite and Pyrite Physical Properties

Polyhalite

Pyrite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

insoluble in water

Durability

Specific Gravity

2.785.00-5.20

1 7.18

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Fracture

Conchoidal

Uneven, Conchoidal, ConchoidalWalter Schumann

Cleavage

Perfect on {10 1 }; parting on {010}

Indistinct on {001}; partings on {011} and {111}

Mohs Hardness

3.56-6.5

2 10

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Chemical Composition

K2Ca2Mg(SO4)4·2H2O

FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Polyhalite and Pyrite Chemical Formula

While comparing Polyhalite and Pyrite 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 Pyrite chemical formula.

Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Polyhalite and Pyrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Pyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Pyrite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 5.00-5.20 whereas that of Pyrite is 5.00-5.20.