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Alunite
Alunite

Demantoid
Demantoid



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Alunite
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Demantoid

Alunite and Demantoid 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
 
-
-
-
3.77-3.95
-
Imperfect
6.5
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.

Alunite and Demantoid Chemical Formula

While comparing Alunite and Demantoid 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 Demantoid chemical formula.

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Alunite and Demantoid Specific Gravity

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