Sardonyx brings strength and protection. Supports the root chakra. It is good for stability in relationships, increases stamina, and improves perception. Sardonyx helps the bones and lungs. Helps the immune system. Metaphysical properties are provided for your information and are not meant to replace the advice of a qualified physician or medical practitioner. Due to the nature of this product, color, size, and shape will vary. Quarter is used for size reference.