chatoyant

adj

1. Having a certain optical reflectance effect, which can be likened to the sheen of a spool of silk.

   “chatoyant effect”

   “I managed to move sufficiently to see at the top, as I fired up the stairs, the yellow face of Dr. Fu-Manchu, to see the gleaming, chatoyant eyes, greenly terrible, as they sought to pierce the gloom.”

   “Cover a tin using two or more colors of chatoyant clay separated by black strips.”

noun

1. A hard stone, such as the cat's-eye, which presents on a polished surface, and in the interior, an undulating or wavy light.