B. The ZERO1 ring draws inspiration from the world-renowned amphitheater - the Colosseum of Rome, truly showcasing BULGARI's creative perspective and challenging the essence of jewelry design. Its unique and pure spiral shape symbolizes the harmony between the past, present, and future - reflected in the magnificent Eternal City - and the pioneering spirit of the series. B. ZERO1 series rings, made of 18K rose gold material, adorned with black ceramic.