Unfortunately there is no hard evidence to say that it is "hardened glass" though, as I said my galaxy spica and other phone screens, which weren't GG or hardened glass afaik didn't scratch when I tried with metal objects.
Besides as I said above, it doesn't matter much what type of glass it has anyway![]()
Well a few guys have been in contact with LG they say in this thread over on XDA, they seem to think it is definately some sort of hardened glass.
"LG has been pretty clear about this since day 1, the back is not Corning Gorilla Glass. They have specifically informed reviewers in the press to not call the back gorilla glass. It is some other kind of hardened glass, either from Corning or another maker. Gorilla Glass is a brand name. Don't get hyped up on brands, they're near-meaningless."
It isn't meaningless either as normal glass has a wider range of materials that can scratch it etc.