Kate Middleton and Meghan Markle are backing this major jewellery trend

(Image credit: REX)

ICYMI, Prince Charles celebrated his 70th birthday last night, with a super fancy party at Buckingham Palace, and royal guests from around the world attended - Queen Rania of Jordan, Prince Albert and Princess Charlene of Monaco to name just a few.

Naturally, his family were also there, and pulled out all the stops for the black tie dinner - and that involves diamonds of course.

While we didn't catch a glimpse of the Duchesses of Sussex and Cambridge's outfits, we did see their statement earrings and they were beautiful.

Kate Middleton matched hers to her pink ballgown (we could just about make out the sleeves), opting for a pink diamond drop style, which she has worn a few times before, at the 2017 BAFTAs and at the 100 Women in Hedge Fund dinner in 2011.

There isn't much info out there on the earrings, but there is speculation that they were a wedding gift as she got married earlier that year.

Meanwhile, Meghan also opted for some coloured diamonds: her earrings featured three strand dangling from a larger yellow diamond. Stunning. They are believed to be on loan from the Queen.

Penny Goldstone

Penny Goldstone is the Digital Fashion Editor at Marie Claire, covering everything from catwalk trends to royal fashion and the latest high street and Instagram must-haves.

Penny grew up in France and studied languages and law at the Sorbonne Nouvelle University in Paris before moving to the UK for her MA in multimedia journalism at Bournemouth University. She moved to the UK permanently and has never looked back (though she does go back regularly to stock up on cheese and wine).

Although she's always loved fashion - she used to create scrapbooks of her favourite trends and looks, including Sienna Miller and Kate Moss' boho phase - her first job was at MoneySavingExpert.com, sourcing the best deals for everything from restaurants to designer sales.

However she quit after two years to follow her true passion, fashion journalism, and after many years of internships and freelance stints at magazines including Red, Cosmopolitan, Stylist and Good Housekeeping, landed her dream job as the Digital Fashion Editor at Marie Claire UK.

Her favourite part of the job is discovering new brands and meeting designers, and travelling the world to attend events and fashion shows. Seeing her first Chanel runway IRL at Paris Fashion Week was a true pinch-me moment.