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Malachite
Malachite

Alunite
Alunite



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Malachite
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Alunite

Malachite and Alunite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.25-4.10
Conchoidal, Uneven
Perfect on { 2 01} fair on {010}
3.5-4
Cu2CO3(OH)2
 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6

Malachite and Alunite Chemical Formula

While comparing Malachite 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 Malachite and Alunite chemical formula.

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Malachite and Alunite Specific Gravity

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