Pyrite and Rock Crystal Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
insoluble in water
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
5.00-5.20
  
2.65
  
Fracture
Uneven, Conchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
  
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Indistinct on {001}; partings on {011} and {111}
  
Not Available
  
Mohs Hardness
6-6.5
  
7
  
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
SiO 2Walter Schumann , Gemstones of the world (2001)
  
Pyrite and Rock Crystal Chemical Formula
While comparing Pyrite and Rock Crystal 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 Pyrite and Rock Crystal chemical formula.
- Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
Pyrite and Rock Crystal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyrite and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrite and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Pyrite is 2.65 whereas that of Rock Crystal is 2.65.