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Piemontite
Piemontite

Covellite
Covellite



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Piemontite
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Covellite

Piemontite and Covellite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
-9999
Uneven, Splintery
[001] good, [100] distinct
6-6.5
Ca2Al3(SiO4)(Si2O7)O(OH)
 
Flexible
-
-
4.6-4.76
-
Perfect on {0001}
-9999
CuSMichael O’Donoghue , Gems, Sixth edition (2006) More from other references

Piemontite and Covellite Chemical Formula

While comparing Piemontite 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 Piemontite and Covellite chemical formula.

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Piemontite and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Piemontite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite Vs Covellite during the identification of gemstone. Specific gravity of Piemontite is whereas that of Covellite is .