Finally, i got my Gorilla Glass 2 scratch! I asked my friend, he said that "yes. Gorilla glass can resist scratches from sharp thing or key, but it could be easily scratched only by dust." is that true? Gorilla 'kryptonite' is dust or sands?
Gorilla glass is very hardwearing and scratch resistant, but its not impervious. Dust isn't its kryptonite, i think he was making an analogy when he said it can be easily scratched by dust.
Torque is what will cause the damage. Gently running a carving knife over The glass probably wont hurt it. But hold some tin foil on it and press it hard while turning and you will mark it.