As everyone will tell you Gorilla is scratch RESISTANT NOT SCRATCH PROOF.
The ads that demo how tough Gorilla glass is show them using coins,keys and knives on the screen mainly. These are "softer" than the layer on the glass so it doesn't scratch.
Sand however is very "hard" so it can easily scratch Gorilla glass. If you got sand in the pouch and it rubbed on the screen it will definitely scratch it.
It's actually a very good product and is more resistant than other glass but it isn't indestructible and the manufacturers don't claim it to be.
Sand is a screens worst enemy.
P.S Why did you post this in Q+A?
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Last edited by Obagleyfreer; 23rd January 2014 at 10:12 PM.