Neptunite and Fluorite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
slightly water soluble and in hot hydrochloric acid
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.19-3.23
  
3.00-3.25
  
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
  
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
  
Cleavage
{110} good
  
Octahedral, perfect on {111}, parting on {011}
  
Mohs Hardness
5-6
  
4
  
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
  
CaF2
  
Neptunite and Fluorite Chemical Formula
While comparing Neptunite and Fluorite 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 Neptunite and Fluorite chemical formula.
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Fluorite- CaF2
Neptunite and Fluorite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Neptunite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.