Tiffany or Pandora Bracelet and a charm. Get her a new charm every birthday to add to the bracelet.
Discussion
That's a good point, I'm sure I got her a bracelet for charms years ago but she never wore it and I forgot about it...might ask her if she's still got it and what charms are on there then top it up.
Different theme for the charm every year. Based on what's been an important milestone that previous year.