Kyanite and Chalcedony Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.53-3.65
  
2.55-2.70
  
Fracture
Splintery, Brittle, Metallic
  
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
  
Cleavage
[100] perfect [010] imperfect with 79° angle between
  
Absent
  
Mohs Hardness
4-7
  
6.5-7
  
Chemical Composition
Not Available
  
SiO2
  
Kyanite and Chalcedony Chemical Formula
While comparing Kyanite and Chalcedony 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 Chalcedony chemical formula.
>- Chemical formula of Chalcedony- SiO2
Kyanite and Chalcedony Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.