Shells decorate the shells of shellfish such as clams. Some of them have pearl-like iridescent luster, so they are used in jewelry industry to make necklaces and clothing accessories (buttons, etc. ), even installed on jewelry, more used to make shell carvings, collages, inlaid handles, etc.

2. What is a shell?

Shells are shells of molluscs living near the water, and they are calcifications formed by secretions of special gland cells of molluscs, which are used to protect soft parts of the body. Compared with natural calcium carbonate minerals in nature, shells have a unique multi-scale and multi-level "brick mud" assembly structure, and have excellent characteristics such as good toughness and high strength because of their multi-level layered structure.