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.
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.
>On most Apple Watch models, the display is laminated to a machined and polished single crystal of sapphire.