Material Trade Name Nero Impala®
Other Commercial Names Nero Africa, Rustenburg
Country of Origin South Africa
Location East of Rustenburg, North West Province
Geological Classification Gabbro-norite
Lithostratigraphic Unit Rustenburg layered suite of the Bushveld Igneous Complex
Macroscopic Description

Unfractured medium-grained dark grey rock consisting of phenocrysts of grey and black minerals
Microscopic Description

Primary Minerals:
Plagioclase (64%), orthopryoxene (30%), clinopryoxene (4%)
Secondary Minerals:
Amphibole (<1%), chlorite (<1%), sericite (<1%), talc (<1%)
Grain Size Medium - 5mm to 10mm
Texture Granular