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That Sapphire iPhone glass sure seems a lot like Transparent Aluminum, now... "hello, iPhone"

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-e...

http://www.macrumors.com/2013/11/12/apples-new-manufacturing...

/u/aivaomo is hellbanned, but here is his reply to my earlier comment:

Make that the 5S’ home button/TouchID sensor. Plus the outermost element of the rear camera lens is rather sensibly sapphire, IIRC.

Reply on news.ycombinator.com