It's rare to see a royal engagement ring with a flash of green about it. Emeralds aren't the most popular pick for royal betrothals but the few that have hit the headlines are all rather striking. And as the gem is the birthstone for May, now seems a good time to look at that rarest…
While the late Queen initially had high hopes for Meghan Markle when she first started dating Prince Harry, her husband Prince Philip was apparently less sure and shared his concerns with the monarch