Properties of Anthracite and Obsidian
Physical Properties
  
  
Hardness
1-1.5
  
5-5.5
  
Grain Size
Medium to Fine Coarse Grained
  
Not Applicable
  
Fracture
Conchoidal
  
Conchoidal
  
Streak
Black
  
White
  
Porosity
Less Porous
  
Very Less Porous
  
Luster
Shiny
  
Vitreous
  
Compressive Strength
Not Available
  
Cleavage
Non-Existent
  
Non-Existent
  
Toughness
Not Available
  
Not Available
  
Specific Gravity
1.1-1.4
  
2.6-2.7
  
Transparency
Opaque
  
Translucent
  
Density
1.25-2.5 g/cm3
  
2.6 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
1.32 kJ/Kg K
  
4
0.92 kJ/Kg K
  
10
Resistance
Heat Resistant, Water Resistant
  
Heat Resistant, Impact Resistant
  
Anthracite vs Obsidian Properties
Properties of Anthracite and Obsidian play an important role in determining the type of rock. Along with Anthracite vs Obsidian properties, get to know more about Anthracite Definition and Obsidian 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 Anthracite and Obsidian.