Kate Middleton’s most valuable jewellery, from Princess Diana’s engagement ring to Queen Elizabeth’s US$1 million Lover’s Knot tiara and Royal Family Order brooch

Kate Middleton has valuable jewellery of her own, but can also call on the royal collection of historic tiaras, brooches and necklaces. Photo: @StyleExec/Twitter
If you are Catherine, Duchess of Cambridge, having just the right jewel to match every occasion and every outfit is never a problem. She owns a number of fine pieces of her own, plus she can call on the palace’s unparalleled collection when an auspicious event calls for an extra level of bling.

Here we take a look at some of the most jaw-dropping jewellery she has rocked since becoming a royal.

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Queen Mary’s tiara and brooch set: at least US$1 million

Queen Elizabeth loaned Kate Middleton the Lover’s Knot tiara, plus a necklace and earrings, to wear to a state dinner at Buckingham Palace in October 2018. The items were created by Garrard for Queen Mary in 1913 or 1914. The tiara alone is thought to be worth at least US$1 million today.

As if that wasn’t enough, the queen also loaned her Royal Family Order brooch that features a painting of her – said to be the greatest honour a member of the family could receive.

“I can confirm that Her Majesty awarded the Duchess of Cambridge with the Order in 2017,” a spokesperson told Vanity Fair at the time – six years after Kate officially became a member of the royal family.

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Kate’s engagement ring: US$550,000

Prince William with then bride-to-be Kate Middleton, wearing Princess Diana’s sapphire ring, ahead of their wedding at Westminster Abbey on April 29, 2011. Photo: AFP Photo/Clarence House
Who could forget Kate’s stunning engagement ring? The 12-carat oval Ceylon sapphire surrounded by 14 solitaire diamonds and set in 18k white gold previously belonged to Princess Diana, but unlike many royal jewels, it is not custom-made. The House of Garrard ring came from a selection of stock rings kept by the queen ( as depicted in Netflix’s The Crown).
A sapphire ring modelled after Princess Diana’s famous engagement ring that her son, Prince William, gave to his fiancée Kate Middleton for their engagement, displayed at the Natural Sapphire Company in New York, in November 2010. Photo: EPA-EFE

Although the ring was claimed by Prince Harry after Diana’s death, he gave it to his older brother for his proposal to Kate. William said at the engagement announcement that he gave her the ring because Kate is very special to him, and that it was his way of making sure his mother didn’t miss out on the excitement of the day.

The blue bling is valued at a cool US$550,000 today.

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Queen Mary’s choker-turned-bracelet: US$345,000

Kate Middleton toasts Chinese president Xi Jinping. Photo: @MirrorRoyal/Twitter

Kate has often worn Queen Mary’s diamond chain link choker as a bracelet – including paired with a tiara to meet Chinese President Xi Jinping at an October 2015 state dinner. The piece was worn by the queen mother in her 75th birthday official portraits by Norman Parkinson and was loaned to Kate by Queen Elizabeth.

Kate wore it again at a black-tie dinner in Paris, France, in 2017.

It is estimated to be worth a whopping US$345,000.

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Kate’s bracelet: US$275,000

Kate Middleton with her diamond bracelet. Photo: @ConnectFashion_/Twitter

Kate’s white and yellow gold diamond bracelet was a gift from the British royal family after she married William. The piece is part of a set that includes matching earrings, but the bracelet alone is valued at more than US$275,000. The precious piece of jewellery is believed to be a gift from her father-in-law, Prince Charles.

Fact or fiction? The truth about Prince Charles’ jewellery gifts on The Crown

Kate’s Cartier set: US$160,000

Kate Middleton shows her Olympic spirit at a London art opening. Photo: @popsugar/Pinterest

Forget the Olympic rings, Kate stepped out during the 2012 London Olympic Games wearing some stunning hoops of her own. She rocked white, yellow and rose 18k gold intertwined circles on a necklace from Cartier.

The Duchess of Cambridge donned the show-stopping necklace worth US$71,600 again for an evening reception in New York, while she wore the matching earrings at an event in 2016. The set is worth US$160,000.

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“It’s a personal piece which she’s had for some time. It’s not an official Olympic item but it’s appropriate to wear it,” a St James’s Palace spokesperson said of her Olympic appearance.

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  • The queen loaned the Duchess of Cambridge some of her most prestigious pieces, including the tiara Garrard made for Queen Mary
  • Prince Harry gave his mum’s ring to Prince William for his proposal to Kate, while she wore her own blinging Cartier necklace for the 2012 London Olympic Games