Sardonyx
The Banded Stone of Courage and Triumph
Also known as: Sardinian Onyx
About the stone

Sardonyx combines alternating layers of sard and onyx, varying in range from orange to red to black. Onyx means claw or fingernail in Latin, and sard means red. Sardonyx has been prized for thousands of years. It is mentioned in the Bible many times. Ancient Greeks used to go into battle with cameos of the God Mars carved into Sardonyx. They also used it to make signet rings that would make impressions in wax seals, as it doesn't stick to wax. During the Renaissance in Europe, Sardonyx was said to bestow eloquence, and midwives used it to ease childbirth by placing a piece between the breasts of laboring mothers. Today & throughout history, much of the world's Sardonyx is dyed agate or calcite material.
Mineral data
- Chemical composition: Sardonyx is a banded variety of cryptocrystalline quartz (chalcedony), silicon dioxide with the formula SiO2, made of alternating layers of sard (reddish brown chalcedony) and onyx; much of what is sold is dyed agate or calcite.
- Hardness: 6.5 to 7 on the Mohs scale.
- Color: Brownish red to orange with straight white and black banding, with a waxy luster that turns glassy when polished.
- Specific gravity: 2.6-2.65 g/cm3
- Refractive index: 1.450-1.550
Metaphysical data
Sardonyx, recognized for its warm banded layers and ancient history, has been used in metaphysical practices to encourage courage, success and integrity.
Protective and Strengthening Energy
- Sardonyx is believed to enhance protection, willpower, energy, stamina and strength of character, much as ancient soldiers carried it into battle.
- It is thought to combine the grounding energies of onyx with the courage of carnelian, cultivating the feeling that anything is possible and desires are within reach.
Emotional Healing
- This stone is traditionally said to encourage one to live with integrity and morality, bringing peace of mind through honest conduct.
- It is often used to support relationship health and wellness, with a note of caution that its charisma should not overwhelm others.
Harmonizing Energy Centers
- Sardonyx is associated with the root chakra, thought to ground its courageous fire and keep ambition connected to the earth.
- Working with this center is said to build a secure base from which confidence can grow.
Zodiac Associations
- Sardonyx is linked with Leo and Aries, signs known for courage and presence, and may appeal to those who lead with warmth and drive.
- It is said to vibrate to the number 3, a number connected with creativity, joy and expression.
Spiritual Growth
- Sardonyx is called a stone of success, prosperity and recognition, and it was said in the Renaissance to bestow eloquence.
- It is also thought to increase luck in legal matters and in obtaining justice, especially over money or property.
Physical Healing
- Sardonyx is not a substitute for professional medical advice; some traditions say it aids the healing of bones and muscle tissue, cleans the blood and increases resistance to disease.
- It is also said to invigorate and help heal the sensory organs, but any health concern needs a qualified professional.
Care and handling
Sardonyx is a hard, durable quartz variety, but much of it is dyed agate or calcite, which is more delicate. Clean with warm water, mild soap and a soft cloth, then dry it, and avoid solvents, acids and long soaking that can affect dyes or calcite. Store it away from harder stones, since it can still chip if struck.
Individual experiences with Sardonyx vary, and its effects are personal and not guaranteed. Use it with mindful intention, and let it support courage and honest living.