Quote Originally Posted by earlofsodbury View Post
I don't have the bottle to try that - I managed to scratch a sapphire crystal (no external AR coating - the actual sapphire) by catching it on a 'granite' (Larvikite) worktop. There's no way there's any diamond in that stuff, but it still managed to scratch the crystal, so...
Introduce velocity and a softer material will still scratch sapphire, but if your watch could talk it would be saying "yeah, but you should see the state of the other guy."