An ancient paintbox
On the granite slopes of Lukenya Hill, a rocky outcrop rising from the Athi-Kapiti plains, archaeologists have found a long and continuous record of ancient human life. The rock shelters on this hill contain stratified deposits that span the transition from the Middle Stone Age (MSA) to the Later Stone Age (LSA), beginning as early as 50,000 years ago. Among the thousands of stone tools and animal fossils, numerous pieces of ochre provide direct evidence of pigment processing by early Homo sapiens.
The ochre consists of iron-rich rocks and earth, which early humans ground to produce powders. The colors, primarily reds and yellows, come from the minerals hematite (iron oxide) and goethite (iron hydroxide). At Lukenya Hill, dozens of ochre pieces show clear signs of human use. Many have flattened facets with parallel striations, evidence of being rubbed against a coarse grindstone to create a fine powder. This pigment production is not an isolated event; it represents a persistent technological and cultural practice maintained at this specific location for thousands of years. The ochre appears alongside sophisticated stone tool technologies, including small, finely made microliths characteristic of the LSA, which may have been used as spear points or arrowheads.