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Mottramite
Mottramite

Covellite
Covellite



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Mottramite
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Covellite

Mottramite and Covellite Physical Properties

Physical Properties

Tenacity

Brittle
Flexible

Solubility

Soluble
-

Durability

-
-

Specific Gravity

5.94.6-4.76
1 7.18
👆🏻

Fracture

Sub-Conchoidal
-

Cleavage

None observed
Perfect on {0001}

Mohs Hardness

3-9999
2 10
👆🏻

Chemical Composition

PbCu(VO4)(OH)
CuSMichael O’Donoghue , Gems, Sixth edition (2006) More from other references

Mottramite and Covellite Chemical Formula

While comparing Mottramite 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 Mottramite and Covellite chemical formula.

  • Chemical formula of Mottramite- PbCu(VO4)(OH)
  • Chemical formula of Covellite- CuSMichael O’Donoghue , Gems, Sixth edition (2006) More from other references

Mottramite and Covellite Specific Gravity

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