The object is a a Neolithic grindstone for grinding such things as medicine, grass seeds, snuff and foodstuffs, e.g. grains, on a grindstone. Although this stone was collected between the 19th and early 20th century century, together with the grindstone they represent (one of) the oldest grinding and crushing devices and techniques in Africa. In the 19th century, just like today, rolling stones were also used to sharpening weapons such as knives and axes. Like many others this whetstone is also made of very hard, crystalline, light-coloured stone which has hardly changed colour due to the dirt that has accumulated over time and and handling has made it almost unrecognisable. These stones are widespread throughout Africa (south of the Sahara), making it difficult to so that it is difficult to attribute them to a specific ethnic group. The collector and the exact circumstances of acquisition remain remain unclear so far (processing status: 2023). Due to the colonial collection context, the object is still to be categorised as sensitive.