How it began
Stone Age people began digging ochre out of Lion Cavern, in the Ngwenya mine area of present-day Eswatini, tens of thousands of years ago. Charcoal from the site was sent for radiocarbon dating in 1964 and gave a very early date, and UNESCO describes the red ochre and hematite workings as one of the oldest known mining operations in the world. Newer dating by optically stimulated luminescence, published in 2024, confirmed the great age of the site, which researchers put at about 48,000 years.
How it works
Ochre is a naturally occurring, lightfast earth mineral. According to the German Archaeological Institute, people have used it as a pigment, a sunblock, an additive in adhesives, and for medicinal and ritual purposes. At Lion Cavern the mineral was not simply picked up from the surface. The 2024 study found that it was deliberately selected, systematically extracted, and then carried over long distances to other Stone Age sites.
How it spread
The 2024 study, published in Nature Communications, analyzed 173 samples from fifteen Stone Age sites in the region. From these the research team, led by the German Archaeological Institute and the Senckenberg Centre for Human Evolution and Palaeoenvironment in Tübingen, reconstructed regional networks of ochre extraction, transport and use. The researchers concluded that these practices did not develop in isolation but were part of a wide network shaped by exchange, seasonal migration and symbolic communication.
What lasted
The findings point to knowledge about ochre being handed down across generations. The German Archaeological Institute notes that the tradition lives on in Eswatini, notably in wedding ceremonies. Mining at Ngwenya also continued in other forms: UNESCO records an iron ore mine at the site dating to about 400 CE, long after the ochre workings began.
Where it stands today
Ngwenya Mines is on Eswatini's tentative list for UNESCO World Heritage status. Research at Lion Cavern continues through a long-term cooperation between the German Archaeological Institute, the Eswatini National Trust Commission and the University of Eswatini, which aims to involve young local researchers and to strengthen protection of the site. The institute describes Lion Cavern as the oldest known site of intensive, continuous ochre extraction in the world.
