Polyhalite and Hematite Physical Properties

Polyhalite

Hematite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.785.00-5.30

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

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

None, may show partings on {0001} and {10 1 1}

1.7 Mohs Hardness

3.56

2 10

1.8 Chemical Composition

Not Available

Fe 2O 3Arthur Thomas , Gemstones (2009)

Polyhalite and Hematite Chemical Formula

While comparing Polyhalite and Hematite 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 Hematite chemical formula.

Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

Compare Red Gemstones

Polyhalite Vs Jacinth

Polyhalite Vs Vanadinite

Polyhalite Vs Heliotrope

Polyhalite and Hematite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Hematite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Hematite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 5.00-5.30 whereas that of Hematite is 5.00-5.30.