Apophyllite KF and Kyanite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.33-2.37
  
3.53-3.65
  
Fracture
Uneven, Brittle, Uneven, Brittle, Uneven
  
Splintery, Brittle, Metallic
  
Cleavage
Perfect on {001}, imperfect on {110}
  
[100] perfect [010] imperfect with 79° angle between
  
Mohs Hardness
4.5-5
  
4-7
  
Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
  
Not Available
  
Apophyllite KF and Kyanite Chemical Formula
While comparing Apophyllite KF 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 Apophyllite KF and Kyanite chemical formula.
- Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
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Apophyllite KF and Kyanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apophyllite KF and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite KF and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite KF is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.