An In-Depth Look at Cerachrom: Rolex's Exclusive Ceramic Creation

The blue and red Cerachrom bezel insert of the Rolex Oyster Perpetual GMT-Master II in 18 ct white gold, 2014, achieves the performance of high tech ceramic with the iconic aesthetics of the original 1955 model In lieu of off-the-shelf solutions the Swiss manufacture has created Cerachrom, its own exclusive and patented ceramic that's currently used in specific professional models Rolex Oyster Perpetual GMT-Master II, 2005, in 18 ct yellow gold, with black Cerachrom bezel marked the first time Rolex used Cerachrom in its timepieces.

The Oyster Perpetual Cosmograph Daytona in 18 ct Everose gold was the first time Rolex used a monobloc Cerachrom bezel, which is friction fitted onto the crystal and the middle case Rolex Oyster Perpetual Cosmograph Daytona in 950 platinum, 2013, with a chestnut brown monobloc Cerachrom bezel and an ice blue dial Where the blue meets the red in the Cerachrom bezel in the Rolex Oyster Perpetual GMT-Master II, where the demarcation between the two colours is sharp, precise and clear.

Red had been a colour for which no stable mineral pigments exist to create a Cerachrom component, but Rolex was able to surmount this by producing a red ceramic. . Source