Used as a stone of strength and protection since ancient times, Sardonyx is associated with courage, happiness and clear communication. It brings lasting happiness and stability to marriage and partnerships. The spiritual values of red and white-banded and red bullseye sardonyx make these stones particularly powerful. In fact, they are said to allow one to project such an incredible charisma that many people suggest the stone be used with care to avoid overwhelming others. Wear them, they say, when you want extra power in a particular circumstance.