PHYSICAL - MECHANICAL FEATURES
Commercial trade name: AFRICAN BLACK
Geological classification: GABBRO
Mineralogical composition:
Major constituent minerals: PLAGIOCLASE, PYROXENE, QUARTZ, MICROLINE
- Accessory minerals: HORNBLENDE, BIOTITE, MAGNETITE
Physical Properties:
- Compressive strenght, MPa (nominal value): 427,7
- Water absorption, % m/m:
- Atmospheric pressure: 0.11
- Induced pressure: 0.11
Density:
- Bulk density, kg/m3: 3105
- Relative density: 3,10
- Abrasion resistance, wear, mm: 1,30
- Coefficient of thermal expansion; per C: 4,67 x 10-6
 
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