Alexandrite and Benitoite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Insoluble: HCl
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.69-3.81
  
3.61-3.68
  
Fracture
Not Available
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
1,1 ; 3,2.
  
[10 1 1] poor
  
Mohs Hardness
8.5
  
6-6.5
  
Chemical Composition
BeAl 2 O 4
  
BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Alexandrite and Benitoite Chemical Formula
While comparing Alexandrite and Benitoite 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 Benitoite chemical formula.
- Chemical formula of Alexandrite- BeAl 2 O 4
- Chemical formula of Benitoite- BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alexandrite and Benitoite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alexandrite and Benitoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Benitoite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 3.61-3.68 whereas that of Benitoite is 3.61-3.68.