Properties
Physical Properties
Hardness
5.5-6
5.5-6
Grain Size
Large and Coarse Grained
Coarse Grained
Fracture
Uneven, Splintery or Conchoidal
Irregular
Streak
White
White
Porosity
Highly Porous
Less Porous
Luster
Earthy
Metallic
Cleavage
Imperfect
Perfect
Toughness
1.5
2.1
Specific Gravity
5-5.3
8.4
Transparency
Translucent to Opaque
Opaque
Density
Not Available
2.6-3.7 g/cm3
Thermal Properties
Specific Heat Capacity
3.20 kJ/Kg K
1
0.63 kJ/Kg K
21
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant
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