Kyanite and Gyrolite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.53-3.65
  
2.48
  
Fracture
Splintery, Brittle, Metallic
  
Brittle, Uneven, Brittle, Uneven
  
Cleavage
[100] perfect [010] imperfect with 79° angle between
  
Perfect on {001}
  
Mohs Hardness
4-7
  
2
  
Chemical Composition
Not Available
  
NaCa16Si23AlO60(OH)8•64(H2O)
  
Kyanite and Gyrolite Chemical Formula
While comparing Kyanite and Gyrolite 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 Gyrolite chemical formula.
>- Chemical formula of Gyrolite- NaCa16Si23AlO60(OH)8•64(H2O)
Kyanite and Gyrolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Gyrolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Gyrolite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.48 whereas that of Gyrolite is 2.48.