Obsidian and Spodumene Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.35-2.60
  
3.15-3.21
  
Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal
  
Uneven, Subconchoidal, Gemstones (2009)
  
Cleavage
Not Available
  
Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°
  
Mohs Hardness
5-5.5
  
6-7
  
Chemical Composition
Not Available
  
LiAlSi2O6
  
Obsidian and Spodumene Chemical Formula
While comparing Obsidian and Spodumene 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 Spodumene chemical formula.
>- Chemical formula of Spodumene- LiAlSi2O6
Obsidian and Spodumene Specific Gravity
Another important criteria for qualitative analysis of gemstones is Obsidian and Spodumene Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Spodumene Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 3.15-3.21 whereas that of Spodumene is 3.15-3.21.