The Folklore of Sardonyx
Sardonyx combines alternating layers of sard and onyx to create a reddish zebra-striped gemstone with white bands. It is one of three of August’s birthstones. Used as a stone of strength and protection in ancient times, sardonyx is associated with courage, happiness, and clear communication. Ancients believed that placing a sardonyx gemstone at each corner of a house would grant protection against evil. Amulets and talismans made of sardonyx were thought to give the wearer a boost of energy. Ancient Romans would carve Mars—the god of war—or Hercules into the gemstone to promote courage. Sardonyx was used in the Middle Ages