Polyhalite and Cordierite Physical Properties

Polyhalite

Cordierite

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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

2.782.57-2.66

1 7.18

1.5 Fracture

Conchoidal, Brittle

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

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

Fair on {100}, poor on {001} and {010}

1.7 Mohs Hardness

3.57-7.5

2 10

1.8 Chemical Composition

Not Available

Mg2Al4Si5O18

Polyhalite and Cordierite Chemical Formula

While comparing Polyhalite and Cordierite 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 Cordierite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18

Compare Red Gemstones

Polyhalite Vs Vanadinite

Polyhalite Vs Heliotrope

Polyhalite Vs Jacinth

Polyhalite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.