Kate Middleton's new pearl necklace is both sustainable and affordable

(Image credit: Samir Hussein/WireImage)

The Duchess of Cambridge is away on her first solo trip to Denmark, and today was snapped visiting the Copenhagen Infant Mental Health Project at the University of Copenhagen.

For the occasion, she chose jewellery that was chic, sustainable and affordable. Her gorgeous pearl necklace is by British designer Monica Vinader, a favourite of Kate's.

You can buy the chain and the pearl separately, but together they come in at just £120, a reasonable amount for a necklace that should last you a lifetime.

Nura Pearl Necklace - £120 at Monica Vinader

Nura Pearl Necklace - <a href="https://click.linksynergy.com/deeplink?id=xU%2AITpjPkO4&mid=38267&u1=hawk-custom-tracking&murl=https%3A%2F%2Fwww.monicavinader.com%2Fgift-sets%2Fnura-baroque-pearl-pendant-charm-and-gp-fine-chain-17-43cm-with-adjuster" data-link-merchant="click.linksynergy.com"">£120 at Monica Vinader
The Duchess has chosen this piece by sustainable British jewellery designer Monica Vinader for her first solo trip. We love the versatility that this particular piece allows for: you can wear the pearl and chain separately or together.

The stunning pendant is made with a cultured freshwater pearl which is rainbow in lustre and features natural irregular silhouettes with varying sizes.

It's also worth nothing that the chain is made from 100% recycled gold vermeil and sterling silver, reducing CO2 emissions by over 60%. Monica Vinader pieces also come with a lifetime repair service, so they're a true investment.

When it came to styling, Kate Middleton paired the necklace with the matching earrings, which was the perfect contrasting touch to her red Zara jacket perfectly.

And proving she is the re-wear queen - eagle-eyed fans will have noticed that this hasn't been the jacket's first outing - she has chosen to re-wear the boucle blazer after wearing it recently, most notably during the football world cup.

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.