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Scheelite
Scheelite

Alunite
Alunite



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Scheelite
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Alunite

Scheelite and Alunite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

5.9-6.32.6-2.9
1 7.18
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Fracture

Conchoidal, Uneven
Conchoidal, Uneven

Cleavage

On {101}, distinct; on {112}, interrupted; on {001}, indistinct
On {0001}, perfect

Mohs Hardness

4.5-53.5-4
2 10
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Chemical Composition

CaWO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
KAl3(SO4)2(OH)6

Scheelite and Alunite Chemical Formula

While comparing Scheelite 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 Scheelite and Alunite chemical formula.

  • Chemical formula of Scheelite- CaWO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Alunite- KAl3(SO4)2(OH)6

Scheelite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Scheelite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Scheelite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Scheelite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.