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Hematite
Hematite

Polyhalite
Polyhalite



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Hematite
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Polyhalite

Hematite and Polyhalite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
5.00-5.30
Uneven, ConchoidalWalter Schumann, Conchoidal
None, may show partings on {0001} and {10 1 1}
6
Fe 2O 3Arthur Thomas , Gemstones (2009)
 
Brittle
Soluble
-
2.78
Conchoidal
Perfect on {10 1 }; parting on {010}
3.5
K2Ca2Mg(SO4)4·2H2O

Hematite and Polyhalite Chemical Formula

While comparing Hematite 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 Hematite and Polyhalite chemical formula.

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Hematite and Polyhalite Specific Gravity

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