I don't know why you expect it would be prone to cracking, but it isn't - or else a wedding ring would have a life expectancy shorter than the average marriage.

I don't know why you expect it would be prone to cracking, but it isn't - or else a wedding ring would have a life expectancy shorter than the average marriage. As for a reflective screen, the term for that is "shiny", and could be marketed as desirable - it signals that the owner has an expensive watch. It wouldn't interfere with use, unless the user was wearing a bright headlamp.