Cat's Eye is also known as Chrysoberyl. It has a sheen to it that is called something called chatoyancy which is formed from fibrous inclusions or cavities within the stone. This chatoyancy allows the stone to resemble a cat's eye.
It is an excellent crystal for transmutation so you can use it for releasing negativity and attracting positive vibes.
It is good for compassion, kindness, creativity, patience and confidence.