Cat's Eye shows a cat's eye effect known as chatoyancy, caused by fine mineral fibers reflecting light in a single band. Chrysoberyl Cats Eye is the best known of all the stones that show this effect. Quartz Cats Eye and Ruby Cats Eye are popular in jewelry making. Cats Eye is a traditional good luck stone, believed to protect its owner from disaster. It is strongly associated with vision and the ability to see and think clearly. Cats Eye crystals help balance the Third Eye and Root Chakras.