Polyhalite and Sylvite Physical Properties

Polyhalite

Sylvite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.781.993

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, Brittle

1.6 Cleavage

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

Perfect on [100], [010], [001]

1.7 Mohs Hardness

3.52.5

2 10

1.8 Chemical Composition

Not Available

Polyhalite and Sylvite Chemical Formula

While comparing Polyhalite and Sylvite 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 Sylvite chemical formula.

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Polyhalite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 1.993 whereas that of Sylvite is 1.993.