cat’s-eye

noun, plural cat’s-eyes.

1. any of certain gems having a chatoyant luster, especially chrysoberyl.
2. a playing marble marked with eyelike concentric circles.

noun

1. any of a group of gemstones, esp a greenish-yellow variety of chrysoberyl, that reflect a streak of light when cut in a rounded unfaceted shape
2. Also called: ataata a grazing marine gastropod, Turbo smaragdus, of New Zealand waters