It would have been easier to put two pieces of ceramic together, but Rolex went for the more difficult route. The process begins with creating the bezel as one color, and then adding the other color before the bezel hardens. The result is a bi-color, single ceramic ring, with no bleeding of color and gradual fading. Rolex is the only brand in the world to do this patented process.
Omega Speedmaster Dark Side of the Moon – In 2014, Omega launched the Dark Side of the Moon, an all-black Speedmaster. Made of zirconium dioxide ceramic, it was the first watch to have its main components, including the dial, crown, buckle, and pushers, to be made out of ceramic.
Other ceramic watches use DLC or PVD material to match the watch’s ceramic body or bezel; the Dark Side of the Moon is crafted entirely from a single block of ceramic. A technical feat and one of Omega’s greatest successes in recent memory.