TiC Is a method of exceptionally tricky ceramic, and it may even be far more scratch-resistant than sapphire with a Mohs hardness rating approximately 9.five. The bezel is also topped with sapphire, providing just as much security as you can into the micro gasoline tubes that sort the markers. Complication: https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/