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Alunite
Alunite

Ulexite
Ulexite



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Alunite
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Ulexite

Alunite and Ulexite 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
 
-
-
-
1.65-1.99
Uneven
{010} Perfect, {110} Perfect
2-2.5
NaCaB 5O 6(OH) 6 · 5H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Alunite and Ulexite Chemical Formula

While comparing Alunite and Ulexite 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 Ulexite chemical formula.

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Alunite and Ulexite Specific Gravity

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