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Tephrite
Tephrite

Tuff
Tuff



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Tephrite
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Tuff
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Properties

Hardness

Grain Size

Fracture

Streak

Porosity

Luster

Compressive Strength

Cleavage

Toughness

Specific Gravity

Transparency

Density

Specific Heat Capacity

Resistance

 
6.5
Medium to Fine Coarse Grained
Uneven
Bluish Black
Very Less Porous
Subvitreous to Dull
90.00 N/mm2
Crenulation and Pervasive
2.4
2.86
Opaque
2.8-2.9 g/cm3
0.92 kJ/Kg K
Heat Resistant, Impact Resistant
 
4-6
Fine Grained
Uneven
White
Highly Porous
Vitreous to Dull
243.80 N/mm2
-
-
2.73
Opaque
1-1.8 g/cm3
0.20 kJ/Kg K
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant