is chalcedony quartz with a fine texture and is generally an opaque brownish-black in colour. Black Onyx is always dyed to enhance the colour. Onyx is formed by layers of silica being deposited in the gas cavities of lava, giving it a distinct banded appearance. It is found in India, Brazil, Uruguay and the USA. It is believed to heighten your awareness and promote happiness.

a black opaque stone.

though not true onyx, it's deep black color is a classic for jewelers and beadworkers. It is said to improve clarity of sight and mental capacities, and protects against the evil eye.