Chatoyant /(?)/

Cha·toy·ant

Chatoyant

a.
  1. Having a changeable, varying luster, or color, like that of a changeable silk, or oa a cat's eye in the dark. (Min.)

Chatoyant

n.
  1. A hard stone, as the cat's-eye, which presents on a polished surface, and in the interior, an undulating or wary light. (Min.)