Topic summary
Stones
Extracted from the Wikipedia article Rock (geology).
Tools
Stone tools have been used for millions of years by humans and earlier hominids. The Stone Age was a period of widespread stone tool usage. Early Stone Age tools were simple implements, such as hammerstones and sharp flakes. Middle Stone Age tools featured sharpened points to be used as projectile points, awls, or scrapers. Late Stone Age tools were developed with craftsmanship and distinct cultural identities. Stone tools were largely superseded by copper and bronze tools following the development of metallurgy.