Chatoyance [shuh-toi-uhnce]

1. Changing in luster or color

2. The property of some minerals to exhibit a wavy, luminous band with a silky luster, reminiscent of the eye of a cat, in the center of a cabochon-cut (polished, with a rounded, un-faceted convex surface) stone.

18k Yellow Gold Agate Earrings