The brief is a necklace that will last (presumably not date), biggish/chunky so can be worn over clothes. I think the idea is she can wear it daily. It's a 40th birthday gift.
Recipient normally prefers reds to blues, engagement/wedding/eternity rings are platinum. She has a fairly senior position within a rather staid organisation. Budget is £50ish - can go a bit higher for the perfect necklace.
Please can any advise as this is so far out of my area of knowledge/expertise/comfort I have been ignoring that I need to get one for about 2 months so far...
Thank you 