Alexandrite and Fire Opal Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.69-3.81
  
1.97-2.22
  
Fracture
Not Available
  
Conchoidal, Conchoidal, Gemstones of the world (2001)
  
Cleavage
1,1 ; 3,2.
  
Not Available
  
Mohs Hardness
8.5
  
6-6.5
  
Chemical Composition
BeAl 2 O 4
  
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
  
Alexandrite and Fire Opal Chemical Formula
While comparing Alexandrite and Fire Opal 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 Fire Opal chemical formula.
- Chemical formula of Alexandrite- BeAl 2 O 4
- Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Alexandrite and Fire Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alexandrite and Fire Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alexandrite and Fire Opal Optical Properties during the identification of gemstone. Specific gravity of Alexandrite is 1.97-2.22 whereas that of Fire Opal is 1.97-2.22.