Finding A "Holey" or Hagstone

"Finding a “holey” or Hagstone on the ground is considered good luck. This is a stone that has a hole naturally worn through it. Those who wear one around their neck believe they can be cured of many diseases. It is also good for keeping fairies away. Many hang a holey stone over the crib to protect their babies." From Granny Buck's Dibs and Dabs