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Properties of Tephrite and Luxullianite


Properties

Physical Properties
  
  

Hardness
6-7   
6.5   

Grain Size
Large and Coarse Grained   
Medium to Fine Coarse Grained   

Fracture
Not Available   
Uneven   

Streak
White   
Bluish Black   

Porosity
Less Porous   
Very Less Porous   

Luster
Dull to Grainy with Sporadic parts Pearly and Vitreous   
Subvitreous to Dull   

Compressive Strength
175.00 N/mm2   
13
90.00 N/mm2   
22

Cleavage
Not Available   
Crenulation and Pervasive   

Toughness
Not Available   
2.4   

Specific Gravity
2.6-2.7   
2.86   

Transparency
Opaque   
Opaque   

Density
2.6-2.8 g/cm3   
2.8-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.79 kJ/Kg K   
16
0.92 kJ/Kg K   
10

Resistance
Heat Resistant, Wear Resistant   
Heat Resistant, Impact Resistant   

Reserves >>
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