It was first rumored back in 2012 that Apple would opt for sapphire covered displays for the next generation iPhone, but that hasn’t materialized up till now. All iPhones since then, including the latest flagship, tout Corning’s Gorilla Glass. There’s chatter once again of Apple testing out sapphire covered iPhones, a new report coming in from Taiwan claims that Foxconn has actually manufactured 100 prototype units of an iPhone with a sapphire covered display.