Obsidian and Schorl Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.35-2.60
  
3.18-3.22
  
Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal
  
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
Not Available
  
{1011} Indistinct
  
Mohs Hardness
5-5.5
  
Not Available
  
Chemical Composition
Not Available
  
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
  
Obsidian and Schorl Chemical Formula
While comparing Obsidian and Schorl 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 Schorl chemical formula.
>- Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Obsidian and Schorl Specific Gravity
Another important criteria for qualitative analysis of gemstones is Obsidian and Schorl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Schorl Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 3.18-3.22 whereas that of Schorl is 3.18-3.22.