Zincite and Alexandrite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
5.50-5.90
  
3.69-3.81
  
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Not Available
  
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
  
1,1 ; 3,2.
  
Mohs Hardness
4
  
8.5
  
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
  
BeAl 2 O 4
  
Zincite and Alexandrite Chemical Formula
While comparing Zincite 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 Zincite and Alexandrite chemical formula.
- Chemical formula of Zincite- (Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Alexandrite- BeAl 2 O 4
Zincite and Alexandrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Zincite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zincite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Zincite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.