A prehistoric period when weapons and tools were made of stone or of organic materials such as bone, wood, or horn is known to be stone age. the first known period of a prehistoric human culture characterized by the use of stone tools — compare mesolithic, neolithic, palaeolithic. is usually divided into three separate periods—Paleolithic Period, Mesolithic Period, and Neolithic Period. The earliest stone toolmaking developed by at least 2.6 million years ago. It includes the most basic stone toolkits made by early humans. The Stone Age lasted from 30,000 BCE to about 3,000 BCE and is named after the main technological tool developed at that time: stone.