Comment on Why Apple Didn't Use Sapphire for iPhone ScreensComments−jonifico11yThis video explains the reasons quite well. https://www.youtube.com/watch?v=kVQbu_BsZ9oAlthought saphire is in fact stronger, it is it's lack of flexibility and absorption properties that don't make it as viable for phone use.−nodata11yWhy did they buy a plant in Arizona then?−zackangelo11yThey're using it on the watch.On most Apple Watch models, the display is laminated to a machined and polished single crystal of sapphire.http://www.apple.com/watch/technology/−paul_f11yThe iPhone is a camera that makes phone call. There's a lot of camera lenses to make.
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This video explains the reasons quite well. https://www.youtube.com/watch?v=kVQbu_BsZ9o
Althought saphire is in fact stronger, it is it's lack of flexibility and absorption properties that don't make it as viable for phone use.
Why did they buy a plant in Arizona then?
They're using it on the watch.
http://www.apple.com/watch/technology/
The iPhone is a camera that makes phone call. There's a lot of camera lenses to make.