Green Onyx is a variety of colored chalcedony, having vibrant shades of green. It is appreciated in jewelry for its smooth and glossy appearance, being associated in various cultures with balance and positive energy.

Like other types of onyx, it has a medium to high hardness (approx. 7 on the Mohs scale). However, it can present fine cracks if hit hard or exposed to harsh chemicals. Moderate care ensures the color and impeccable finish are maintained over time.