Properties of Tephrite and Gneiss
Physical Properties
  
  
Hardness
6.5
  
7
  
Grain Size
Medium to Fine Coarse Grained
  
Medium to Coarse Grained
  
Fracture
Uneven
  
Irregular
  
Streak
Bluish Black
  
White
  
Porosity
Very Less Porous
  
Very Less Porous
  
Luster
Subvitreous to Dull
  
Dull
  
Compressive Strength
90.00 N/mm2
  
22
125.00 N/mm2
  
17
Cleavage
Crenulation and Pervasive
  
Poor
  
Toughness
2.4
  
1.2
  
Specific Gravity
2.86
  
2.5-2.7
  
Transparency
Opaque
  
Translucent to Opaque
  
Density
2.8-2.9 g/cm3
  
2.6-2.9 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
0.92 kJ/Kg K
  
10
Not Available
  
Resistance
Heat Resistant, Impact Resistant
  
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
  
Tephrite vs Gneiss Properties
Properties of Tephrite and Gneiss play an important role in determining the type of rock. Along with Tephrite vs Gneiss properties, get to know more about Tephrite 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 Tephrite and Gneiss.