Chalcedony and Nepheline Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.55-2.70
  
2.55-2.65
  
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
Absent
  
[1010] Poor
  
Mohs Hardness
6.5-7
  
5-6
  
Chemical Composition
SiO2
  
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
  
Chalcedony and Nepheline Chemical Formula
While comparing Chalcedony and Nepheline 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 Chalcedony and Nepheline chemical formula.
- Chemical formula of Chalcedony- SiO2
- Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chalcedony and Nepheline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.