How Kate Middleton made the ring stack her signature jewellery trend of 2025

Then, of course, there’s Kate’s iconic engagement ring: once owned by Princess Diana, the 12-carat opal-cut sapphire, surrounded by 14 round-cut diamonds, was originally designed by Garrard, and remains one of the most famous ever pieces of royal jewellery. After Prince William proposed in 2010 on a trip to Kenya, the ring rarely seemed to leave Kate’s hand, with ‘big blue’ quickly becoming one of the most in-demand ring styles globally. Indeed, Garrard’s ‘1735’ ring, which is…