Feldspar and Jacobsite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.56-2.75
  
4.76-5.03
  
Fracture
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)
  
Conchoidal, Brittle
  
Cleavage
two or three
  
None
  
Mohs Hardness
6-6.5
  
5.5-6.5
  
Chemical Composition
Not Available
  
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
  
Feldspar and Jacobsite Chemical Formula
While comparing Feldspar and Jacobsite 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 Feldspar and Jacobsite chemical formula.
>- Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Feldspar and Jacobsite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Feldspar and Jacobsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Feldspar and Jacobsite Optical Properties during the identification of gemstone. Specific gravity of Feldspar is 4.76-5.03 whereas that of Jacobsite is 4.76-5.03.