Properties of Coal and Gneiss
Grain Size
Medium to Fine Coarse Grained
Medium to Coarse Grained
Fracture
Conchoidal
Irregular
Porosity
Less Porous
Very Less Porous
Luster
Dull to Vitreous to Submetallic
Dull
Compressive Strength
Not Available
Cleavage
Non-Existent
Poor
Toughness
Not Available
1.2
Specific Gravity
1.1-1.4
2.5-2.7
Transparency
Opaque
Translucent to Opaque
Density
1100-1400 g/cm3
2.6-2.9 g/cm3
Specific Heat Capacity
Not Available
Resistance
Heat Resistant
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
Coal vs Gneiss Properties
Properties of Coal and Gneiss play an important role in determining the type of rock. Along with Coal vs Gneiss properties, get to know more about Coal 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 Coal and Gneiss.