Shellfish contains pearl powder, which can't be shaped because of the failure of culture. These powders are hand-made, and it is easier to shape mother-of-pearl, that is, the shell that breeds pearls, than natural pearls, and it is also a common material. Mother-of-pearl has great differences in color, grain and details because of its living environment and the influence of foreign substances. Different varieties of mother-of-pearl will produce different pearls, and there will be many differences in their own color patterns. Mother-of-pearl is often used as external decoration and inlay material because of its beautiful color. It should be noted that mother-of-pearl is fragile and easily damages raw materials in the process of extraction, cutting, carving, polishing and inlaying. Mother-of-pearl and mother-of-pearl are both articles with shells as the main materials, but their manufacturing methods and uses are different. Mother-of-pearl is mainly used to make beads or handicrafts, while mother-of-pearl is mainly used to make jewelry or decorations.