Fig. 1 - flint tip made of worked obsidian.
| The first testimony there is
about the use of cutting material, date back to the finding of blunted blades made of
bones and firestone.
These materials, well-worked, in order to permit a certain sharpening, will soon be substituted by the use of obsidian, the black stone, which, being harder, could permit a major resistence to daily use.