Datolite and Kyanite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.90-3.00
  
3.53-3.65
  
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
  
Splintery, Brittle, Metallic
  
Cleavage
None
  
[100] perfect [010] imperfect with 79° angle between
  
Mohs Hardness
5-5.5
  
4-7
  
Chemical Composition
CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Not Available
  
Datolite and Kyanite Chemical Formula
While comparing Datolite and Kyanite 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 Datolite and Kyanite chemical formula.
- Chemical formula of Datolite- CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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Datolite and Kyanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Datolite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Datolite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Datolite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.