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Alunite
Alunite

Datolite
Datolite



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Alunite
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Datolite

Alunite and Datolite 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
-
-
2.90-3.00
Conchoidal, Uneven
None
5-5.5
CaBSiO 4(OH)Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Alunite and Datolite Chemical Formula

While comparing Alunite and Datolite 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 Datolite chemical formula.

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Alunite and Datolite Specific Gravity

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