White chalcedony is a kind of gem, which is made of natural white jade by artificial processing and coating. White chalcedony is artificially treated, but the raw material-Bai Yushi is a natural product and a mineral with high hardness. Its main components are tremolite and timing. White jade pulp is favored by jewelry lovers because of its whiteness, delicate texture and unique luster, but it is also regarded as a high-grade gem material because of its low output and high price.