In case you needed some proof that the rumors of Apple switching from Corning glass to sapphire crystal are unlikely, Corning has posted a video on its website showing how its current Gorilla Glass is superior to sapphire for mobile devices.
Recently, speculation has arisen that manufactured sapphire crystal might become an alternative to Corning’s Gorilla Glass. “Sapphire’s performance as a cover for high-end watches probably leads to the current speculation. But those covers are much smaller than a mobile phone and are two to three times thicker than Gorilla Glass. In one of our commonly accepted strength tests, sapphire breaks more easily than Gorilla Glass after the same simulated use. Additionally, sapphire’s cost and environmental hit are huge issues,” Steiner said.
There have been a couple rumors floating around that smartphone makers are looking into using sapphire crystal as a replacement for other cover glass solutions. With Apple using the material as a cover for its camera lenses on iPhone 5 and the latest iPod touch, some have speculated it could use sapphire for other parts of its devices, such as the display’s cover glass or home button. However, that’s not likely, according to Corning, Gorilla Glass is “about half the weight”, requires 99 percent less energy in manufacturing, provides brighter displays, and “costs less than a tenth” of sapphire.