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Alunite
Alunite

Natrolite
Natrolite



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Alunite
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Natrolite

Alunite and Natrolite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6
 
Brittle
-
-
2.20-2.26
Uneven
Perfect on {110}
5-5.5
Na 2[Al 2Si 3O 10] · 2H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Alunite and Natrolite Chemical Formula

While comparing Alunite and Natrolite 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 Alunite and Natrolite chemical formula.

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Alunite and Natrolite Specific Gravity

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