Kyanite and Pyrite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
insoluble in water
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.53-3.65
  
5.00-5.20
  
Fracture
Splintery, Brittle, Metallic
  
Uneven, Conchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
  
Cleavage
[100] perfect [010] imperfect with 79° angle between
  
Indistinct on {001}; partings on {011} and {111}
  
Mohs Hardness
4-7
  
6-6.5
  
Chemical Composition
Not Available
  
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Kyanite and Pyrite Chemical Formula
While comparing Kyanite and Pyrite 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 Kyanite and Pyrite chemical formula.
>- Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Kyanite and Pyrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Pyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Pyrite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 5.00-5.20 whereas that of Pyrite is 5.00-5.20.