Humite 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
3.20-3.32
  
3.00-3.25
  
Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal
  
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
  
Cleavage
Poor
  
Octahedral, perfect on {111}, parting on {011}
  
Mohs Hardness
6-6.5
  
4
  
Chemical Composition
(Mg,Fe2+ ) 7(SiO 4) 3(F,OH) 2Anthony et al , Handbook of mineralogy (2001)
  
CaF2
  
Humite and Fluorite Chemical Formula
While comparing Humite 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 Humite and Fluorite chemical formula.
- Chemical formula of Humite- (Mg,Fe2+ ) 7(SiO 4) 3(F,OH) 2Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Fluorite- CaF2
Humite and Fluorite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Humite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Humite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Humite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.