TiC Is usually a sort of particularly tricky ceramic, and it can even be additional scratch-resistant than sapphire with a Mohs hardness rating nearly 9.5. The bezel is likewise topped with sapphire, offering just as much defense as possible to the micro fuel tubes that variety the markers. Chopard's Mille https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/