The Holy Grail is made with tempered glass, which gives it a nine rating on the Mohs scale of mineral hardness, as hard as ruby and one away from diamond's perfect ten. You can scratch this with your keys, a knife, or a rock, and — unless it's a diamond — you'll still have a clear screen. While it's in fact made of bulletproof glass, it's not actually bulletproof, although the news team above does put it to the test and the phone does survive (it wasn't held down firmly, so the bullet just pushed it out of the way instead of shattering it).
Ethan Wolff-Mann is the Gear editor of Supercompressor. His phone is miraculously still functional. Follow him on Twitter @ewolffmann.