Stone tools refer to tools made of rocks. They are the primary production tools of human beings and prevailed in the early period of human history. From the appearance of human beings to the appearance of bronzes, * * * has experienced two or three million years and belongs to primitive society. According to the different stages of development, it can be divided into Paleolithic Age and Neolithic Age, and some people list a transitional Mesolithic Age between Neolithic Age and Paleolithic Age. Stone tools were used in the Paleolithic Age. This kind of stone tool is made of stone cores or chips hit by stones and processed into a certain shape. Types are shredders, scrapers, pointed devices, etc. Grinding stone tools prevailed in Neolithic Age. This kind of stone tool is first made of stone or cut into appropriate shapes, and then ground on polished stone. There are many kinds, such as axe, chisel, knife, sickle, plow, spear and trowel. Some exquisite stone tools can be made into mirror shapes. Qijia culture and other late Neolithic cultures, you can see a small number of red bronzes such as knives, chisels and mirrors. After Xia and Shang Dynasties, human society entered a class society, but in Xia and Shang Dynasties, even later, stone tools were still used as important tools. Limited by the technical level of ore body mining, smelting, casting and forging, many metal tools and weapons at that time were developed from grinding stone tools. The shape of axe, hoe, shovel, knife, sickle, arrow, etc. Stone tools are not only the ancestors of bronze, but also affect iron. It is worth noting that after the appearance of metal utensils, some grinded stone tools directly followed the shape of bronzes, such as cymbals, swords and axes. The company strives to build an appraisal auction trading platform for antiques (porcelain, jade, calligraphy and painting, teapot, Tianhuang, Buddha statue, bronze mirror, ancient coins, furniture, lacquerware, tooth carving, wood carving, jewelry, jadeite, strange stone, famous wine, etc.). ).