Through eons of time, man has made their tools from stone. From simple bone smashing hand held choppers (for acquiring bone marrow) to more elaborate clovis fluted spear points to more modern arrowheads. The most prized of materials for pre-historic stone tool development was the volcanic glass known as obsidian. Obsidian from the Western United States has been found in the shape of pre-historic artifacts across much of the U.S. A large portion of this obsidian came from volcanic areas in the Great Basin. Dale Duby of Prairie City, Oregon recreates the stone tools items by many of the same techniques use by pre-historic man. Grinding, abrading, percussion and pressure flaking.