Kyanite and Pezzottaite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.53-3.65
  
2.90-3.14
  
Fracture
Splintery, Brittle, Metallic
  
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Cleavage
[100] perfect [010] imperfect with 79° angle between
  
Imperfect; basal
  
Mohs Hardness
4-7
  
7.5-8
  
Chemical Composition
Not Available
  
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
  
Kyanite and Pezzottaite Chemical Formula
While comparing Kyanite and Pezzottaite 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 Pezzottaite chemical formula.
>- Chemical formula of Pezzottaite- (Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
Kyanite and Pezzottaite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Pezzottaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Pezzottaite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.90-3.14 whereas that of Pezzottaite is 2.90-3.14.