Cryolite and Zincite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.97
  
5.50-5.90
  
Fracture
Uneven
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Cleavage
None observed
  
On {10 1 0}, perfect; parting on {000 1 }
  
Mohs Hardness
2.5
  
4
  
Chemical Composition
Na 3AlF 6Ulrich Henn and Claudio C.
  
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
  
Cryolite and Zincite Chemical Formula
While comparing Cryolite and Zincite 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 Cryolite and Zincite chemical formula.
- Chemical formula of Cryolite- Na 3AlF 6Ulrich Henn and Claudio C.
- Chemical formula of Zincite- (Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
Cryolite and Zincite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cryolite and Zincite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cryolite and Zincite Optical Properties during the identification of gemstone. Specific gravity of Cryolite is 5.50-5.90 whereas that of Zincite is 5.50-5.90.