Sardonyx stone

Sardonyx is a composition of the stones sard and onyx. Both names result in a three-coloured appearance: white (light blue), red (brown) and black. There are no synonyms for sardonyx. It is only found in India.

Sardonyx is light blue, white, red, orange, brown or black.


Mineral class of oxides
Formula: SiO2 + Fe,Mn,O,OH)

Mohs hardness: 6.5 - 7
Density: 2.58 - 2.64
Cleavability: none, uneven, conchoidal fracture
Stroke colour: white
Transparency: translucent

Healing properties
Sensory perception, virtue, strength of character, refines perception, brings joy and confidence