Kyanite and Malachite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.53-3.65
  
3.25-4.10
  
Fracture
Splintery, Brittle, Metallic
  
Conchoidal, Conchoidal, Gemstones (2009), Uneven
  
Cleavage
[100] perfect [010] imperfect with 79° angle between
  
Perfect on { 2 01} fair on {010}
  
Mohs Hardness
4-7
  
3.5-4
  
Chemical Composition
Not Available
  
Cu2CO3(OH)2
  
Kyanite and Malachite Chemical Formula
While comparing Kyanite and Malachite 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 Malachite chemical formula.
>- Chemical formula of Malachite- Cu2CO3(OH)2
Kyanite and Malachite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Malachite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Malachite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.25-4.10 whereas that of Malachite is 3.25-4.10.