Any of several gemstones that display a luminous band reminiscent of the eye of a cat. Grayish green or greenish quartz cat's-eye is the most common type; although it comes from the Orient, it is often called occidental cat's-eye to differentiate it from the rarer, and more valuable, precious or oriental cat's-eye, which is a greenish variety of chrysoberyl. Crocidolite cat's-eye (African cat's-eye) is more commonly known as tigereye. Corundum cat's-eye is an imperfect star sapphire or ruby in which the star is reduced to a luminous zone
A small reflective disc placed on a road surface as a marking that can be seen even at night
any of various gems (as chrysoberyl or chalcedony) that reflect light when cut in a rounded shape
{i} (Gemology) type of gem or chalcedony that reflect light when cut in a circular shape