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Kyanite
Kyanite

Alunite
Alunite



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Kyanite
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Alunite

Kyanite and Alunite Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Not Available
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.53-3.652.6-2.9
Amber
1 7.18
1.5 Fracture
Splintery, Brittle, Metallic
Conchoidal, Uneven
1.6 Cleavage
[100] perfect [010] imperfect with 79° angle between
On {0001}, perfect
1.7 Mohs Hardness
4-73.5-4
Amber
2 10
1.8 Chemical Composition
Not Available
KAl3(SO4)2(OH)6

Kyanite and Alunite Chemical Formula

While comparing Kyanite 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 Kyanite and Alunite chemical formula.

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  • Chemical formula of Alunite- KAl3(SO4)2(OH)6

Kyanite and Alunite Specific Gravity

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