Chamfer Completely Gone on Silver iPhone 5, Is This Normal?

My iPhone 5's Chamfer is almost gone on one side. While it has been reported on black model, I have not seen anything about chamfer chipping away on silver aluminium model.

As you can see in the photo above, at bottom on one end, the shine is gone, meaning the chamfer has completley chipped away. The sides still have some chamfer, but it is so thin that shine is not even visible.

Is this completley normal after one year? I have a black iPad mini, which is now close to one year old, which still has all its chamfer in place, abit some chipped, but not to the point that the shine is completely gone. Should I take it to Apple store to see if anything can be done to rechamfer the device?