Biotite and Kornerupine Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.7-3.3
3.25-3.45
Fracture
Uneven, Even, Yellow, White
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
Cleavage
Perfect on the {001}
Good on {110}
Mohs Hardness
2.5-3.0
6.5
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Biotite and Kornerupine Chemical Formula
While comparing Biotite and Kornerupine 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 Biotite and Kornerupine chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Biotite and Kornerupine Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Kornerupine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Kornerupine Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.25-3.45 whereas that of Kornerupine is 3.25-3.45.