Properties of Coal and Comendite
Physical Properties
  
  
Hardness
1-1.5
  
6-7
  
Grain Size
Medium to Fine Coarse Grained
  
Medium Grained
  
Fracture
Conchoidal
  
Pervasive
  
Streak
Black
  
Bluish Black
  
Porosity
Less Porous
  
Highly Porous
  
Luster
Dull to Vitreous to Submetallic
  
Dull
  
Compressive Strength
Not Available
  
92.40 N/mm
2
  
21
Cleavage
Non-Existent
  
Not Available
  
Toughness
Not Available
  
2
  
Specific Gravity
1.1-1.4
  
2.38
  
Transparency
Opaque
  
Opaque
  
Density
1100-1400 g/cm3
  
Not Available
  
Thermal Properties
  
  
Specific Heat Capacity
1.32 kJ/Kg K
  
4
Not Available
  
Resistance
Heat Resistant
  
Heat Resistant, Impact Resistant
  
Coal vs Comendite Properties
Properties of Coal and Comendite play an important role in determining the type of rock. Along with Coal vs Comendite properties, get to know more about Coal Definition and Comendite 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 Coal and Comendite.