Originally Posted by mrawesome421
Uh, no, not quite.
Some change in the same pocket as your phone (simple one time mistake..) and within a 12 hr day you're screen should see some of that 'screen to coin' action that's been going on in your pocket all day between the two. I'm really not sure wth this scratch-resistant screen rumor came from, but it's not how it really is. Gorilla Glass, or w/e it is, it shows scratch's easier than it's advertised.
An object can scratch another object if its hardness is greater than or equal to the scratched object.
Gorilla glass has a hardness rating of between 622-700 on the HV10 scale. In order for an object to scratch it then it must have a hardness rating of 700 or greater.
Coins, like quarters and dimes, are made out of coprenickel, which is a copper nickel alloy
Copernickel has a hardness rating of between 90-140, and a bit more if you if you use cold working.
So no, coins cannot scratch gorilla glass. Neither can anything else in your pocket.
Some of the silicates in sand, or the hardened minerals in rocks can have a hardness rating greater than 700, but coins and keys do not. If you work in a rock query get a screen protector. The rest of us are probably safe.