Kornerupine and Alexandrite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.25-3.45
3.69-3.81
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
Not Available
Cleavage
Good on {110}
1,1 ; 3,2.
Chemical Composition
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references
BeAl 2 O 4
Kornerupine and Alexandrite Chemical Formula
While comparing Kornerupine and Alexandrite 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 Alexandrite 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 Alexandrite- BeAl 2 O 4
Kornerupine and Alexandrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kornerupine and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kornerupine and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Kornerupine is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.