Properties
Physical Properties
Hardness
1-1.5
3.5-4
Grain Size
Medium to Fine Coarse Grained
Fine to Medium Grained
Fracture
Conchoidal
Conchoidal
Streak
Black
White to Grey
Porosity
Less Porous
Highly Porous
Luster
Shiny
Dull
Cleavage
Non-Existent
Slaty
Toughness
Not Available
1.5
Specific Gravity
1.1-1.4
3-3.2
Transparency
Opaque
Opaque
Density
1.25-2.5 g/cm3
2.8-2.9 g/cm3
Thermal Properties
Specific Heat Capacity
1.32 kJ/Kg K
4
Not Available
Resistance
Heat Resistant, Water Resistant
Impact Resistant, Pressure Resistant
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