The Nokia 920 uses Gorilla Glass. The same glass used on the iPhone.
So.....
Did a quick search on “Nokia 920 glass” and the main thing that appears are comments like “glass shattered”.
So... glass houses, man. :) ha.
Sorry, it is Gorilla Glass 2. It is also rounded on the corners. Check this out!
http://www.youtube.com/watch?v=E3c8il_Q6SU