Kutnohorite and Afghanite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.12
  
2.55-2.65
  
Fracture
Subconchoidal, Brittle, Conchoidal
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle
  
Cleavage
Perfect on {10 1 1}
  
Perfect {10 1 0}
  
Mohs Hardness
3-4
  
5.5-6
  
Chemical Composition
Not Available
  
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
  
Kutnohorite and Afghanite Chemical Formula
While comparing Kutnohorite and Afghanite 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 Kutnohorite and Afghanite chemical formula.
>- Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Kutnohorite and Afghanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kutnohorite and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kutnohorite and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Kutnohorite is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.