Celtic knots are a variety of stylized endless knots used for decoration. Although Celtic knot designs are dated to pre-Christianity, they are well known for their use in the ornamentation of Christian monuments and manuscripts such as the 8th century Book of Kells.

Our Celtic Mother of Pearl Marquise Drop Earrings incorporates Mother of Pearl, or nacre which is the iridescent substance that is a secretion of the mantle tissue of some fresh and salt-water mollusks. The chief sources of nacre are the pearl oyster, found primarily in Asia and freshwater pearl mussels, which live in many rivers of the United States, Europe, and Asia; and the abalone of California, Japan, and other Pacific regions.

This iridescent inner layer has been used for centuries in making jewelry as well as furniture, art and architecture.