Sardonyx is a highly protective stone and is known for bringing more self control. If you need more mental discipline and motivation, this is the stone for you. Sardonyx is actually a mix of Carnelian and Onyx, therefore it contains the healing properties of both.
In ancient Egypt, people wore Sardonyx to protect them from negativity and bring courage.
For physical healing, this stone has been used to alleviate allergy symptoms and back pain. We should all be honest people with strong moral principles, which can be hard when we live in the world that we do. Carry or wear Sardonyx to help keep you on track and maintain your integrity.