Properties of Pumice and Greywacke
Physical Properties
  
  
Hardness
6
  
6-7
  
Grain Size
Fine Grained
  
Angular and Fine
  
Fracture
Planar
  
Conchoidal
  
Streak
White, Greenish White or Grey
  
White
  
Porosity
Highly Porous
  
Highly Porous
  
Luster
Earthy
  
Dull
  
Compressive Strength
51.20 N/mm
2
  
26
Not Available
  
Cleavage
Perfect
  
Perfect
  
Toughness
3
  
2.6
  
Specific Gravity
2.86
  
2.2-2.8
  
Transparency
Opaque
  
Opaque
  
Density
0.25-0.3 g/cm3
  
2.6-2.61 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
0.87 kJ/Kg K
  
14
Not Available
  
Resistance
Impact Resistant, Pressure Resistant
  
Heat Resistant, Impact Resistant, Pressure Resistant
  
Pumice vs Greywacke Properties
Properties of Pumice and Greywacke play an important role in determining the type of rock. Along with Pumice vs Greywacke properties, get to know more about Pumice Definition and Greywacke 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 Greywacke.