Cryolite and Herderite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.97
  
2.90-3.02
  
Fracture
Uneven
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
None observed
  
Indistinct on {110}
  
Mohs Hardness
2.5
  
5-5.5
  
Chemical Composition
Na 3AlF 6Ulrich Henn and Claudio C.
  
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
  
Cryolite and Herderite Chemical Formula
While comparing Cryolite and Herderite 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 Herderite chemical formula.
- Chemical formula of Cryolite- Na 3AlF 6Ulrich Henn and Claudio C.
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Cryolite and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cryolite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cryolite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Cryolite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.