The obstacles behind the demise of the sapphire iPhone screen

In the year leading up to the release of the iPhone 6, Apple invested more than $1 billion in an effort to make sapphire one of the device's big selling points. Making screens out of the nearly unscratchable material would have helped set the new phone apart from its competitors. When Apple announced the iPhone 6 this September, however, it didn't have a sapphire screen, only a regular glass one. And a month later, the small New Hampshire-based company chosen to supply Apple with enormous quant

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