Speaking to Express.co.uk at the time of the engagement, Tobias Kormind, managing director of 77Diamonds.com, said: “Princess Beatrice’s ring is a beautiful 3.5 carat round diamond, of medium quality, set in an art deco design, with tapered baguettes on each side of the centre stone. 

“I would value this ring at £60,000.”

Princess Eugenie also has a stunning engagement ring, designed by royal jeweller Garrard & Co.

The royal has been married to Jack Brooksbank since 2018 and her engagement ring has a central pink stone surrounded by a number of small diamonds.