Nero Africa Granite
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Synonyms: Africa Rustemberg, African Impala, Afrika Schwarz, Black Impala, Diorit Impala, Eagle Black, Impala Black, Impala Gabbro, Impala Granit, Impala KM, Impala Nero, Impala Schwarz, Impala-Granit, Jasberg, Marikana, Marikana Black, Negro Impala, Negro Rustemberg, Negro Rustemburg, Negro Sudafrica, Nero Africa, Nero Africa Impala, Nero Afrika, Nero Impala, Nero Impala Africa, Nero Impala Afrika, Nero Rustemberg, Noir Afrique, Preto Impala, Preto SK, Rustemberg, Rustemburg, Rustenberg, Rustenberg Grey, Rustenberg Impala, Rustenburg, Rustenburg Grey
Location: Nero Africa granite is quarried in the Bosspruit region, Rustenburg, Northwest, South Africa
Description: Nero Africa granite is a dark grey gabbro/norite of the Precambrian period. This stone internationally may be nominated as a granite and in the area of application of the European Standard this stone must be nominated as a granite. Ideal for both interior and exterior use, Nero Africa granite is frost free and polish constant. There are several quarries in the Bosspruit region, available are Impala Light, Impala Medium and Impala Dark.
Mineral Composition: Feldspar, pyroxene, hornblende, quartz, predominant are dark minerals
Technical and Physical Characteristics:
Compression tensile strength: 2940 kg/cm2
Tensile strength after freeze-thaw cycles: 2820 kg/cm2
Unitary modulus of bending tensile strength: 236 kg/cm2
Water imbibition coefficient: 0.000100
Impact strength: 58 cm
Mass by unit of volume: 2970 kg/m3
Gabbro: A dark-coloured, coarse-grained intrusive igneous rock. Gabbro is very similar to basalt in its mineral make up. It is composed mostly of the mineral plagioclase feldspar with smaller amounts of pyroxene and olivine.