Goethite and Covellite Physical Properties

Goethite

Covellite

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

HCl soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.294.6-4.76

1 7.18

1.5 Fracture

Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).

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

1.6 Cleavage

Perfect {010}

Perfect on {0001}

1.7 Mohs Hardness

5-5.5Not Available

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

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

Goethite and Covellite Chemical Formula

While comparing Goethite 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 Goethite and Covellite chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Goethite and Covellite Specific Gravity

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