Alexandrite and Verdelite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.69-3.81
2.90-3.40
Fracture
Not Available
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
1,1 ; 3,2.
Not Available
Chemical Composition
BeAl 2 O 4
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Alexandrite and Verdelite Chemical Formula
While comparing Alexandrite and Verdelite 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 Alexandrite and Verdelite chemical formula.
- Chemical formula of Alexandrite- BeAl 2 O 4
- Chemical formula of Verdelite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Alexandrite and Verdelite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alexandrite and Verdelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Verdelite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.90-3.40 whereas that of Verdelite is 2.90-3.40.