Obsidian and Amazonite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.35-2.60
  
2.55-2.57
  
Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal
  
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Cleavage
Not Available
  
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
  
Mohs Hardness
5-5.5
  
6-6.5
  
Chemical Composition
Not Available
  
KAlSi3O8
  
Obsidian and Amazonite Chemical Formula
While comparing Obsidian and Amazonite 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 Obsidian and Amazonite chemical formula.
>- Chemical formula of Amazonite- KAlSi3O8
Obsidian and Amazonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Obsidian and Amazonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Amazonite Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 2.55-2.57 whereas that of Amazonite is 2.55-2.57.