Kyanite and Augite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.53-3.65
  
3.19-3.56
  
Fracture
Splintery, Brittle, Metallic
  
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
[100] perfect [010] imperfect with 79° angle between
  
{110} Perfect, {010} Indistinct
  
Mohs Hardness
4-7
  
5.5-6
  
Chemical Composition
Not Available
  
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
  
Kyanite and Augite Chemical Formula
While comparing Kyanite and Augite 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 Augite chemical formula.
>- Chemical formula of Augite- (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
Kyanite and Augite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Augite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Augite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.19-3.56 whereas that of Augite is 3.19-3.56.