Seashells are composed primarily of calcium carbonate (CaCO₃) in the form of aragonite or calcite. They are formed by marine organisms such as mollusks through biomineralization, where they extract calcium and carbonate ions from seawater to build their shells.

Seashells are often referred to by the type of mollusk that produced them, such as “conch shell,” “clam shell,” or “abalone shell.” When used in beads, they are simply called “seashell beads.”

Seashells have been used in various cultures for their beauty and symbolism. They are often associated with the ocean, femininity, and fertility. In some cultures, seashells are used as talismans for protection and good luck.

Seashells are collected from beaches and shallow waters worldwide. They are cleaned, cut, and polished into beads, used in jewelry and decorative items for their natural beauty and metaphysical properties.