Emerald and Nepheline Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Hard
  
Not Available
  
Specific Gravity
2.67-2.78
  
2.55-2.65
  
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
Imperfect on the [0001]
  
[1010] Poor
  
Mohs Hardness
7.5-8
  
5-6
  
Chemical Composition
Be3Al2SiO6
  
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
  
Emerald and Nepheline Chemical Formula
While comparing Emerald 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 Emerald and Nepheline chemical formula.
- Chemical formula of Emerald- Be3Al2SiO6
- Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Emerald and Nepheline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Emerald and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Emerald and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Emerald is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.
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