In which material?
The shores of Lake Edwaerd revealed an abundant source of cut quartz. This
rock is in the form of very hard crystals, translucent to white opal.
This quartz is difficult to cut but was used as a raw material for the
manufacture of tools.
Tools to do what?
The quartz tools were used to form objects made from softer material, such
as bone (harpoon points, etc.) and certainly wood, although no piece of wood
has yet been found to prove it.
These quartz flakes could be hafted or not, to cut or scrape...
Where does this quartz come from?
The Ishango people did not have to travel far to find their raw material:
veins of quartz pebbles were brought by the river water close to the Ishango site.