Mother-of-Pearl, Natural: Meaning and Properties
Natural mother-of-pearl shell for jewelry refers to the nacre itself, which coats the inside layer of the mollusk shell that forms pearls--hence, it's the mother of the pearl.
Mother-of-Pearl, White: Meaning and Properties
Especially popular in Victorian-inspired jewelry designs, mother-of-pearl shell is often seen as cameos, but it isn't just for feminine jewelry, as it is a favorite for cuff links and tie tacks.
A shell, commonly white but also available in colors and patterns, which is smooth and glossy with a long, narrow, slit-like opening. Historically, cowries of different species have been used as a form of money. Additionally, the cowrie is used in a number of cultures as a symbol of childbirth, femaleness or womanhood.