Peridot and Amethyst Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
insoluble in common solvents
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.54-1.55
  
2.65
  
Fracture
Conchoidal
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Poor
  
Indiscernible
  
Mohs Hardness
6.5-7
  
7
  
Chemical Composition
(Mg,Fe)2SiO4
  
SiO2
  
Peridot and Amethyst Chemical Formula
While comparing Peridot 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 Peridot and Amethyst chemical formula.
- Chemical formula of Peridot- (Mg,Fe)2SiO4
- Chemical formula of Amethyst- SiO2
Peridot and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Peridot and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Peridot and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Peridot is 2.65 whereas that of Amethyst is 2.65.