Onyx is a type of chalcedony, which is a variety of quartz. It is mostly black and white but can also be found in rarer shades of red, brown, green and other colours. The name "onyx" comes from the Greek word "onux" which means claw or "fingernail" this is because the bands of colour on onyx resembles the layers on a fingernail. It is formed in the gas cavities of lava flows so is mostly found in volcanic regions. Onyx has been admired for centuries for its striking appearance, with its bands of alternating colours. It has been used in many ancient cultures and was highly valued in ancient Rome, Greece and Egypt. Onxy is believed to have various metaphysical properties, it is often associated with strength, protection and grounding. It has been also said to help individuals with balancing their emotions and self-control. It is believed that onyx can help balance and activate the root chakra, promoting feelings of stability, strength and connection to the physical world. By working with onyx individuals may be able to enhance their sense of security, overcome fears and anxieties, and establish a solid foundation for personal growth and spiritual development.