One of the three main varieties of chrysoberyl, the third-hardest gemstone. The cat’s-eye gem (cymophane) is light green or yellow and contains the distinctive appearance of a band of light, resembling a cat’s eye. It has been mined since ancient times in India and particularly in Sri Lanka. Jyoti can mean both “light” and “star,” and in describing this jewel the Sanskrit more likely means “banner of light.” However, the Tibetan translates the term as “banner of stars.”

See “cat’s eye.”