lot of Ancient Indian made arrow heads. These were all from Nigangua MO. Osage Fork of the Gaseonade River . They are 1 1/4″ to almost 3″ This came from estate of professor of archeology and history. He was collecting for over 70 plus years. In the Stone Age, people used sharpened bone, flint napped stones, flakes, and chips of rock as weapons and tools. Such items remained in use throughout human civilization, with new materials used as time passed. As archaeological artifacts such objects are classed as projectile points (arrow Heads), without specifying whether they were projected by a bow or by some other means such as throwing since the specific means of projection.