TiC Is usually a sort of very really hard ceramic, and it may even be extra scratch-resistant than sapphire with a Mohs hardness ranking approximately 9.five. The bezel is likewise topped with sapphire, offering as much defense as feasible towards the micro gas tubes that sort the markers. Chopard's Mille https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/