Polyhalite and Covellite Physical Properties

Polyhalite

Covellite

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1 Physical Properties

1.1 Tenacity

Brittle

Flexible

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.784.6-4.76

1 7.18

1.5 Fracture

Conchoidal, Brittle

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

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

Perfect on {0001}

1.7 Mohs Hardness

3.5Not Available

2 10

1.8 Chemical Composition

Not Available

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Polyhalite and Covellite Chemical Formula

While comparing Polyhalite and Covellite 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 Covellite chemical formula.

Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Compare Red Gemstones

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Polyhalite Vs Jacinth

Polyhalite Vs Vanadinite

Polyhalite and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.