Your Next Smartphone Screen May Be Made of Sapphire

Kevin bullis, MIT Technology Review:

Manufactured sapphire—a material that’s used as transparent armor on military vehicles—could become cheap enough to replace the glass display covers on mobile phones. That could mean smartphone screens that don’t crack when you drop them and can’t be scratched with keys, or even by a concrete sidewalk.

Among natural materials only diamonds are harder than sapphire. Compared to Gorilla Glass sapphire is roughly 3x stronger and 3x more scratch resistant.