Sardonyx – Characteristics & Traditionally Attributed Properties
Sardonyx is a variety of chalcedony, combining alternating layers of sard and onyx. It is distinguished by its characteristic banded appearance, featuring tones of red, brown, white, and black. Since antiquity, it has been highly valued, particularly in signet rings, cameos, and men’s jewellery.
Natural Characteristics
Colour: Banded layers in shades of red, brown, white, or black
Hardness: 6.5 – 7 on the Mohs scale
Lustre: Waxy to vitreous
Composition: Silicate mineral (SiO₂) – variety of chalcedony
Transparency: Translucent to opaque
Symbolic & Traditionally Attributed Properties
Traditionally regarded as a stone of strength, protection, and moral integrity.
Associated with courage, self-discipline, and resilience against temptation.
Believed to encourage honesty, stability of character, and loyalty in relationships.
Traditionally used as a protective talisman against negative influences and manipulation.
Said to support confidence in speech and favour public expression.
Historical Reference
Sardonyx was widely used in ancient Greek and Roman jewellery, as well as in Byzantine seals and symbols of authority.
It was also traditionally associated with Mars and the strength of military leaders.


