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Cuprite
Cuprite

Alunite
Alunite



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Cuprite
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Alunite

Cuprite and Alunite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
5.85-6.15
Conchoidal
Fair in four directions forming octahedrons
3.5-4
Cu 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6

Cuprite and Alunite Chemical Formula

While comparing Cuprite and Alunite 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 Cuprite and Alunite chemical formula.

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Cuprite and Alunite Specific Gravity

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