A cat’s eye stone, also known as Lahsuniya or Vaidurya, is a gemstone that exhibits a unique optical effect called chatoyancy, which creates a narrow band of light across the stone’s surface, resembling the slit-like pupil of a cat’s eye. This effect is due to the way light reflects off parallel, needle-like inclusions within the gemstone. While several minerals can display this effect, the most well-known and valuable cat’s eye stone is Chrysoberyl cat’s eye