Properties of Pumice and Gneiss
Physical Properties
  
  
Hardness
6
  
7
  
Grain Size
Fine Grained
  
Medium to Coarse Grained
  
Fracture
Planar
  
Irregular
  
Streak
White, Greenish White or Grey
  
White
  
Porosity
Highly Porous
  
Very Less Porous
  
Luster
Earthy
  
Dull
  
Compressive Strength
51.20 N/mm2
  
26
125.00 N/mm2
  
17
Cleavage
Perfect
  
Poor
  
Toughness
3
  
1.2
  
Specific Gravity
2.86
  
2.5-2.7
  
Transparency
Opaque
  
Translucent to Opaque
  
Density
0.25-0.3 g/cm3
  
2.6-2.9 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
0.87 kJ/Kg K
  
14
Not Available
  
Resistance
Impact Resistant, Pressure Resistant
  
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
  
Pumice vs Gneiss Properties
Properties of Pumice and Gneiss play an important role in determining the type of rock. Along with Pumice vs Gneiss properties, get to know more about Pumice Definition and Gneiss 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 Pumice and Gneiss.