Hmmm, tough choice. If you're going for a silver colour wouldn't it just rust in a few months time if it isn't real? Maybe she would want to keep it with her but rusting rings cause an illness (Can't remember the name; something starting with T)
If it was me, I would probably prefer something similar to the 2nd option since it wouldnt rust and all but silvers pretty nice.
Anyway, I bet she would appreciate anything you get her though. Best of luck!