Remember that video of renowned YouTuber Marques Brownlee (aka MKBHD) taking a knife to what he stated was a genuine iPhone 6 sapphire display cover? In that video, the display part held up well to a ton of bending and scratching from Marques making the display look pretty darn durable.
Now, Mr Brownlee is back with a new video, above, explaining exactly why the display was so resistant to everything thrown its way.
As you’ll see in the video, MKBHD explains that scratch tests with knives and keys are unlikely to leave a mark on a material as hard as sapphire crystal due to the relative hardness of each material. In short, pure sapphire crystal ranks more highly on the Mohs scale meaning it is a harder material than the metal of the keys and knife blade and won’t be scratched by the softer materials.
To further test the scratch resistance this time, Marques employs some industrial sandpapers to really figure out just how hard the sapphire display is. Both garnet and emery sandpapers were able to inflict some damage on the screen suggesting that the sapphire display is lower on the Mohs scale and therefore not pure sapphire crystal. Instead, the display is likely to be a fusion of sapphire and glass panes.
Interestingly, the panel over the Touch ID sensor held up to both sandpapers well suggesting that it could be a pure sapphire crystal covering.
Regardless, the alleged iPhone 6 display cover certainly holds up to the scratching way better than the iPhone 5s Gorilla Glass display suggesting a much improved scratch resistance. For those times when you place your phone in your pocket with your keys, the new display material should have you covered. Just don’t carry heavy-duty sandpaper in your pocket too.
Another video also emerged recently testing the strength of the iPhone 6 sapphire display covering. Lewis Hilsenteger of Unbox Therapy and a pal go all Katniss Everdeen on the display part and shoot some arrows at it. I’ll let you see for yourself how well that turns out: