Kornerupine and Alunite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.25-3.45
2.6-2.9
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
Conchoidal, Uneven
Cleavage
Good on {110}
On {0001}, perfect
Chemical Composition
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
KAl3(SO4)2(OH)6
Kornerupine and Alunite Chemical Formula
While comparing Kornerupine 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 Kornerupine and Alunite chemical formula.
- Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
Kornerupine and Alunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kornerupine and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kornerupine and Alunite Optical Properties during the identification of gemstone. Specific gravity of Kornerupine is 2.6-2.9 whereas that of Alunite is 2.6-2.9.