Properties
Physical Properties
Hardness
6.5
2-3
Grain Size
Fine Grained
Fine Grained
Fracture
Conchoidal
Conchoidal to Uneven
Streak
White
White to Grey
Porosity
Less Porous
Highly Porous
Luster
Subvitreous to Dull
Waxy and Dull
Compressive Strength
290.00 N/mm2
3
Not Available
Cleavage
Perfect
Slaty
Toughness
2.7
2.6
Specific Gravity
2.86
2.56-2.68
Transparency
Opaque
Opaque
Density
2.8-2.9 g/cm3
2.54-2.66 g/cm3
Thermal Properties
Specific Heat Capacity
0.95 kJ/Kg K
9
0.87 kJ/Kg K
14
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant
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