On the Rolex website, the Rolex Cerahrom is quoted as
"..fashioned from extremely hard ceramic material, it is virtually impervious to scratches.."
It is key word is 'virtually'...
Rolex Sub Date. Used lovingly for the past 5 years, daily wear, daily beater.
Scratched at the 11 o'clock bezel marker.
This watch has been used a daily beater and have seen it all. Desk diving, traveling, been on planes, train and automobiles and even the occasional ships.
Truth be told, had it been the normal bezel, there would have been more scratches, a testament to how tough the Cerachrom is.