Sardonyx is a highly protective stone that embodies a vibration of happiness, optimism and confidence. It helps to boost your self control and your level of personal power.
This stone creates an excellent grounding action through the earth and base chakras, and brings you back to earth after spiritual work.
It has excellent metaphysical properties that that encourage motivation, willpower, discipline and strength of character.
This makes it a good stone for anyone studying, or if you work in a job where you require mental discipline to focus on the task at hand.