Allanite and Covellite Physical Properties

Allanite

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

3.40-4.204.6-4.76

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

Perfect on {0001}

1.7 Mohs Hardness

Not AvailableNot Available

2 10

1.8 Chemical Composition

Not Available

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

Allanite and Covellite Chemical Formula

While comparing Allanite 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 Allanite and Covellite chemical formula.

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

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Allanite and Covellite Specific Gravity

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