Feldspar and Amethyst Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
insoluble in common solvents
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.56-2.75
  
2.65
  
Fracture
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
two or three
  
Indiscernible
  
Mohs Hardness
6-6.5
  
7
  
Chemical Composition
Not Available
  
SiO2
  
Feldspar and Amethyst Chemical Formula
While comparing Feldspar and Amethyst 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 Amethyst chemical formula.
>- Chemical formula of Amethyst- SiO2
Feldspar and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Feldspar and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Feldspar and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Feldspar is 2.65 whereas that of Amethyst is 2.65.