Nickeline and Aegirine Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
Not Available
  
3.50-3.60
  
Fracture
Conchoidal, Uneven
  
Uneven, Brittle, Metallic, Brittle, Metallic, Brittle, Metallic
  
Cleavage
{1010} Imperfect, {0001} Imperfect
  
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
  
Mohs Hardness
5-5.5
  
6
  
Chemical Composition
Not Available
  
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
  
Nickeline and Aegirine Chemical Formula
While comparing Nickeline and Aegirine 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 Nickeline and Aegirine chemical formula.
>- Chemical formula of Aegirine- (Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
Nickeline and Aegirine Specific Gravity
Another important criteria for qualitative analysis of gemstones is Nickeline and Aegirine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nickeline and Aegirine Optical Properties during the identification of gemstone. Specific gravity of Nickeline is 3.50-3.60 whereas that of Aegirine is 3.50-3.60.