This picture shows two views of a "classic" Predynastic Gerzean knife. Like many other examples, this knife was broken from a strike in the center of the blade that might suggest that it was ritually "killed." This knife would have been made from a percussion flaked preform that was ground smooth on both faces. Parallel pressure flakes were applied to one side and the blade edge was finely serrated. This Gerzean knife was made from a fine grade of slightly translucent chert and it measures 8 7/8 inches (22.5 cm) long and 2 9/16 inches (6.5 cm) wide.