BAD IDEA OF THE WEEK: The iPhone 6 display

The sapphire display set to feature on Apple's iPhone 6 might not be as scratch-proof as first thought. A display panel allegedly belonging to the iPhone 6 got put through its paces on video this month, with the screen's supposed sapphire crystal coating proving "impossible to scratch" - withstanding keys, a knife, and a foot. However, it now seems that the screen might not be as scratch-proof as first thought, as Marques Brownlee - the same chap who treated us to the last video - has gone at the screen once again and this time around he was armed with sandpaper. Brownlee has once again attacked the 4.7in panel - with the iPhone 6 also expected to launch in a 5.5in version - and uses the Mohs scale to try to guage how much sapphire the panel actually contains. First, Brownlee tests the sapphire panel with garnett sandpaper, which ranks about 7.0 on the Mohs scale, meaning it should be able to scratch Gorilla Glass but not the sapphire display. However, the screen manages to pick up a few scratches - which means that the screen on the iPhone 6 is unlikely to be 100 percent sapphire. This is further proven by the handset's TouchID sensor, which being made from 100 percent sapphire, didn't pick up any marks whatsoever. Next, Brownlee tests the screen with emery sandpaper, which ranks around the 8.0 mark on the Mohs scale, and while it holds up much better than the Gorilla Glass panel of the iPhone 5S, it picks up a fair few scuffs. This likely means that, while the screen on the iPhone 6 will contain sapphire, it will likely be a sapphire/glass blend. Let's hope Apple get it right before next year's release.