Chanced upon this video on youtube. This video shows how GT Advanced Technologies made Sapphire screen for our smartphone.
– hard (Last I know, it is only one-tier below diamond. Correct me if I am wrong) and almost “unscratchable”
– More expensive and heavier than Gorilla Glass (this is what our phone screen made of)
– Sapphire is 67% heavier than Gorilla Glass
A pocketnow.com production.