Apophyllite and Covellite Physical Properties

Apophyllite

Covellite

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.30-2.504.6-4.76

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Perfect on (001)

Perfect on {0001}

1.7 Mohs Hardness

4.5-5Not Available

2 10

1.8 Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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

Apophyllite and Covellite Chemical Formula

While comparing Apophyllite 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 Apophyllite and Covellite chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Apophyllite and Covellite Specific Gravity

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