I had heard that only sharks with laser beams on their heads can scratch a sapphy crystal.
Seriously, I think it's easier to scratch the steel or gold on your watch than your crystal so be careful as if you knock our watch hard enough against something to worry you that the crystal is scratched, it will almost certainly mean you'll have a nice gouge or dent in your watch case or bracelet...."Oh Dalton......"
The crystals are susceptible to chipping or shattering if whacked hard enough or dropped (a bit like toughened glass...hardness usually means more brittle).
Bring back the acryllic I say...bit of Colgate, buffs em up a treat!
J
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