Mother-of-pearl is a beautiful iridescent material often used in jewelry, buttons, and decorative objects. It is also known by various other names including nacre, pearlized, pearly, and pearlescent. The material is produced by certain mollusks such as oysters and abalone, and is formed by layers of calcium carbonate crystals. Other synonyms for mother-of-pearl include iridescence, opalescence, and luster. Its shimmering effect reflects light in different colors, giving a unique and dazzling appearance. Mother-of-pearl is a popular material in fashion, and has been used for centuries as a symbol of wealth and luxury.