Polyhalite and Shigaite Physical Properties

Polyhalite

Shigaite

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1 Physical Properties

1.1 Tenacity

Brittle

Moderately ﬂexible

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.782.32

1 7.18

1.5 Fracture

Conchoidal, Brittle

Flexible Flexible fragments.

1.6 Cleavage

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

Perfect on {0001}

1.7 Mohs Hardness

3.52

2 10

1.8 Chemical Composition

Not Available

Polyhalite and Shigaite Chemical Formula

While comparing Polyhalite and Shigaite 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 Shigaite chemical formula.

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Polyhalite and Shigaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Shigaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Shigaite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.32 whereas that of Shigaite is 2.32.