Cerachrom is a proprietary ceramic material developed by Rolex, primarily used in the production of watch bezels. Known for its exceptional durability and resistance to scratches, Cerachrom is a significant innovation in the field of horology. This material is crafted through a complex process that involves the high-temperature sintering of ultra-fine zirconium or aluminum oxide powders, resulting in a hard, non-reactive surface. One of the key advantages of Cerachrom is its ability to maintain its color and luster over time, even when exposed to harsh environmental conditions, such as UV rays and saltwater.

Rolex introduced Cerachrom in 2005, initially in the GMT-Master II model, and it has since become a staple in their sports watch collections, including the Submariner and Daytona. The bezels made from Cerachrom are not only aesthetically pleasing but also functional, as they are engraved with numerals and graduations that are filled with a thin layer of platinum or gold via a Physical Vapor Deposition (PVD) process. This ensures that the markings remain legible and resistant to wear. Cerachrom's introduction marked a significant advancement in watchmaking, offering a blend of modern technology and timeless elegance, enhancing both the performance and appearance of luxury timepieces.