Amethyst and Dioptase Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
insoluble in common solvents
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.65
  
3.25-3.35
  
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
  
Cleavage
Indiscernible
  
Perfect in three directions
  
Mohs Hardness
7
  
5
  
Chemical Composition
SiO2
  
CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Amethyst and Dioptase Chemical Formula
While comparing Amethyst and Dioptase 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 Amethyst and Dioptase chemical formula.
- Chemical formula of Amethyst- SiO2
- Chemical formula of Dioptase- CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Amethyst and Dioptase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Amethyst and Dioptase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Dioptase Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 3.25-3.35 whereas that of Dioptase is 3.25-3.35.