Hag Stones, also known as Witch Stones, Fairy Stones, Holy Stones and Eye Stones, are stones with naturally formed holes running clean through them. These holes are usually formed by centuries of wave action. It is this association with running water (which itself is said to negate the effect of evil) that is believed by many people to be the source of the Hag Stone’s reputation for guarding their owner against ill-fortune and the Evil Eye.