The iPhone display is covered by Corning’s Gorilla Glass (not sapphire). The iPhone 4S’ TouchID sensor (the home button) is covered by a small synthetic sapphir

The iPhone display is covered by Corning’s Gorilla Glass (not sapphire). The iPhone 4S’ TouchID sensor (the home button) is covered by a small synthetic sapphire pane. However, given Apple’s substantial investment in GT Advanced, the company might use sapphire for larger panes in the future. http://www.macrumors.com/2013/11/04/apple-to-build-new-700-employee-sapphire-glass-manufacturing-plant-in-arizona/ http://www.macrumors.com/2013/11/04/apple-to-build-new-700-e... http://www.macrumors.com/2013/11/12/apples-new-manufacturing-partner-gt-advanced-uses-particle-accelerator-to-cut-sapphire-glass-production-costs/ http://www.macrumors.com/2013/11/12/apples-new-manufacturing...