Onyx is the name given to a black and white banded Agate. Much of the 'Onyx' offered for sale is in fact Banded Calcite from Pakistan or Mexico in varying shades of green, yellow, white and orange.

Onyx has a strong, stable, and grounding energy that can serve as a protective shield, creating a barrier against negative energies and promoting emotional and physical strength. It fosters inner harmony and balance, helping individuals navigate through challenging situations with resilience and composure. Onyx is also associated with enhancing focus, concentration, and mental clarity, making it an excellent crystal for decision-making and problem-solving. It also encourages self-discipline and self-control, empowering individuals to overcome addictive patterns and harmful behaviours. It is believed to promote inner strength and instil a sense of self-confidence and determination.