350 km to the west of Johannesburg and the Witwatersrand reef (the ridge that contains the gold), the mines around Barberton contain visible nugget gold in quartz veins, in addition to fine particles, that are embedded in metamorphosed late Archaean age rocks dating to 3.2-3.4 billion years ago.
In addition to artisanal gold mining, geological materials for industry and construction are worked.
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