Sylvite and Polyhalite Physical Properties

Sylvite

Polyhalite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

1.9932.78

1 7.18

1.5 Fracture

Uneven, Brittle

Conchoidal, Brittle

1.6 Cleavage

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

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

1.7 Mohs Hardness

2.53.5

2 10

1.8 Chemical Composition

Not Available

Sylvite and Polyhalite Chemical Formula

While comparing Sylvite 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 Sylvite and Polyhalite chemical formula.

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Sylvite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sylvite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sylvite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Sylvite is 2.78 whereas that of Polyhalite is 2.78.