TiC Is a type of very tough ceramic, and it can even be much more scratch-resistant than sapphire having a Mohs hardness score nearly 9.five. The bezel is likewise topped with sapphire, providing as much defense as is possible into the micro gasoline tubes that type the markers. Chopard's Mille https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/