Based on hype alone, you'd think that sapphire was the ultimate replacement for glass on phone screens. However, that's not totally true -- while sapphire is extremely scratch-resistant, it's both more expensive and more likely to shatter if your device nose-dives into the sidewalk. Corning may have found a way to combine the best properties of both materials, though. It recently teased Project Phire, a glass that's as resistant to drops as Gorilla Glass 4 while touting scratch protection that "approaches" sapphire. The company isn't saying much more about the technology at this point, but it should go on sale sometime later this year.