Franklinite and Alexandrite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
5.05-5.22
  
3.69-3.81
  
Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
  
Not Available
  
Cleavage
None
  
1,1 ; 3,2.
  
Mohs Hardness
5.5-6
  
8.5
  
Chemical Composition
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
  
BeAl 2 O 4
  
Franklinite and Alexandrite Chemical Formula
While comparing Franklinite 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 Franklinite and Alexandrite chemical formula.
- Chemical formula of Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Alexandrite- BeAl 2 O 4
Franklinite and Alexandrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Franklinite and Alexandrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Franklinite and Alexandrite Optical Properties during the identification of gemstone. Specific gravity of Franklinite is 3.69-3.81 whereas that of Alexandrite is 3.69-3.81.