Properties of Obsidian and Nephelinite
Physical Properties
  
  
Hardness
5-5.5
  
6.5
  
Grain Size
Not Applicable
  
Fine Grained
  
Fracture
Conchoidal
  
Flat
  
Streak
White
  
White
  
Porosity
Very Less Porous
  
Less Porous
  
Luster
Vitreous
  
Vitreous to Metallic
  
Compressive Strength
35.00 N/mm2
  
29
Cleavage
Non-Existent
  
Imperfect
  
Toughness
Not Available
  
2.7
  
Specific Gravity
2.6-2.7
  
2.4-2.9
  
Transparency
Translucent
  
Opaque
  
Density
2.6 g/cm3
  
2.5-3 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
0.92 kJ/Kg K
  
10
0.88 kJ/Kg K
  
13
Resistance
Heat Resistant, Impact Resistant
  
Heat Resistant
  
Obsidian vs Nephelinite Properties
Properties of Obsidian and Nephelinite play an important role in determining the type of rock. Along with Obsidian vs Nephelinite properties, get to know more about Obsidian Definition and Nephelinite Definition. For the ease of understanding, the properties of rocks are divided into physical and thermal properties. Rocks have a variety of properties like hardness, color, specific gravity, fracture, cleavage, luster etc. Know all about physical and thermal properties of Obsidian and Nephelinite.