updated 11:44 am EST, Tue February 11, 2014
Cost of iPhone-sized screens may still be too high
Although Apple and its partners have been prototyping sapphire-covered iPhone screens, the company is still expected to limit use of sapphire to the iWatch at first, according to Taiwanese supply chain sources. The people back the idea that Apple has put significant effort into fitting prototype iPhones with sapphire, but suggest that Apple is likely worried about cost, even though its Arizona plant should soon have more than enough capacity.
The sources claim that the iWatch will use a 2-inch display, making sapphire significantly more affordable. The displays on Apple's current mobile devices are protected by Corning Gorilla Glass; sapphire, though, is considered even more durable, and could let Apple make displays thinner while retaining equal or better protection.