Polyhalite and Cryolite Physical Properties

Polyhalite

Cryolite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.782.97

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven

1.6 Cleavage

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

None observed

1.7 Mohs Hardness

3.52.5

2 10

1.8 Chemical Composition

Not Available

Na 3AlF 6Ulrich Henn and Claudio C.

Polyhalite and Cryolite Chemical Formula

While comparing Polyhalite and Cryolite 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 Cryolite chemical formula.

Chemical formula of Cryolite- Na 3AlF 6Ulrich Henn and Claudio C.

Compare Red Gemstones

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Polyhalite Vs Heliotrope

Polyhalite and Cryolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Cryolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Cryolite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.97 whereas that of Cryolite is 2.97.