There are many Cat's Eye gemstones, but the chrysoberyl variety is considered the best. It is one of the hardest gemstones, making it durable and long-lasting, and it also has a very high refractive index, meaning that it sparkles and catches the light beautifully. Cat's Eye gemstones are said to bring good luck and fortune to those who wear them, and the chrysoberyl variety is especially powerful. If you're looking for a special piece of jewellery that will bring you luck and add a touch of luxury to your life, then a chrysoberyl Cat's Eye is a perfect choice.