In the video above Marques Brownlee demos what is said to be the new screen for the Iphone 6. The screen will be made of Sapphire which is the 2nd hardest substance known to man. In the video you can see that this screen will not be scratched by keys or even a stabbing knife. Sapphire glass is already being used in high end watches and even in Android smartphones. Some Android smartphone cameras use the Sapphire glass for the rear facing camera.