Cat's Eye possesses a unique effect that resembles the slit eye of a cat caused by the reflection of light, called chatoyancy. True cat's eye is created with a variety of chrysoberyl mineral and the most favoured variety is the honey-brown coloured tiger eye.
Miss Milly's cat's eye jewellery uses the man-made version, which features the beautiful chatoyancy effect and comes in a wide range of colours.
Some people believe that wearing cat's eye jewellery protects against evil spirits.