Obsidian and Pectolite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.35-2.60
  
2.74-2.90
  
Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal
  
Uneven, Gemstones (2009), Splintery
  
Cleavage
Not Available
  
Perfect on {100} and {001}
  
Mohs Hardness
5-5.5
  
4.5-5
  
Chemical Composition
Not Available
  
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
  
Obsidian and Pectolite Chemical Formula
While comparing Obsidian and Pectolite 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 Pectolite chemical formula.
>- Chemical formula of Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
Obsidian and Pectolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Obsidian and Pectolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Pectolite Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 2.74-2.90 whereas that of Pectolite is 2.74-2.90.