Alexandrite and Poldervaartite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.69-3.81
  
2.91
  
Fracture
Not Available
  
Handbook of mineralogy (2001)
  
Cleavage
1,1 ; 3,2.
  
None
  
Mohs Hardness
8.5
  
Not Available
  
Chemical Composition
BeAl 2 O 4
  
(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)
  
Alexandrite and Poldervaartite Chemical Formula
While comparing Alexandrite and Poldervaartite 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 Poldervaartite chemical formula.
- Chemical formula of Alexandrite- BeAl 2 O 4
- Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)
Alexandrite and Poldervaartite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alexandrite and Poldervaartite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Poldervaartite Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 2.91 whereas that of Poldervaartite is 2.91.