Stone tools at Nok sites emerge frequently. Beside numerous, often broken grinding tools also axe blades, fragments of stone rings or beads are represented. Every tool has marks of use or appears broken. Raw materials have been Quartzite and granitic stones (grinders), Rose Quartz, Carnelian and Jasper (beads) or vulcanite (stone rings, axe blades). Most of the stones are likely to be in the vicinity of the sites. As many of the sites are nearby granitic rocks the opportunity for grinding could have been an aspect for the choice of the location. Dimples in the stones are common which seem to have been used for crushing different materials. To identify those materials some grinding stones had been analyzed. But these archaeobotanical samples didn't relieve remains of starch to answer this question.
Ground stone axes, huge fragments of grinding stones and a necklace of stone beads.
It's remarkable that tools for cutting like chipped artifacts or hunting projectiles like arrow points are absent so far. The occasional fragments of Hematite and Goethite have sanding marks and indirectly prove the production of color. The frequency of stone tools such as stone axes indicates a use for most of the daily works. It seems that iron as a raw material still was scarce.