The British Royal Family's Most Expensive Jewelry, Ranked

If you've followed the royal family for a while now, you've probably become familiar with their particular brand of opulence. While their fashion choices often get the most attention (for example: Kate Middleton's wedding dress), the royals also dip into the family jewel collection on many occasions, which is just as lavish as you can imagine. It seems that the sky's the limit when it comes to their treasure trove of necklaces, brooches, earrings, and, most notably, tiaras. From some of the largest diamonds in the world to breathtaking emeralds, their collection has it all. There are even a select few items that have been in the family for generations, but are more rarely dusted off for wear.

At this point, it's safe to say that the British royal family and their reported wealth is the stuff of legend. While the women of the family have sported some of the most jaw-droppingly expensive headwear over the years, there's one piece rumored to be worth billions of dollars and the latest wearer is none other than King Charles III. If you're curious about just how much the royal family's dazzling collection of jewelry is worth, look no further. We've ranked some of the family's most expensive pieces, starting from least expensive to most expensive, and converted their prices to what they would cost as of writing, based on inflation. Unsurprisingly, they all start in the millions.

Princess Margaret was always a bit of a rule-breaker and the royal was no different when it came to her wedding attire. Breaking with tradition, Princess Margaret decided not to wear a tiara from the family collection and, instead, bought her own. Named the Poltimore Tiara (after Lady Florence Poltimore), it was a Victorian-style piece she happened to win at an auction for approximately £5,500 in 1959, per Garrard, which would be over $155,000 today. While that might have been considered a steal by royal jewelry standards, her family later sold it at auction for around $1.2 million (per InStyle).

The gorgeous diamond bandeau Meghan Markle wore for her wedding was originally gifted to Queen Mary after her own nuptials. Made of a stunning assortment of diamonds and platinum, the bandeau is estimated to be worth around $3.5 million (via Hello!), as of writing and based on inflation. It also has another unique feature: the floral-like diamond centerpiece can be removed, and the rest of the headpiece was designed around it. While the royal family tends to share jewels often, this particular piece hasn't been seen much other than on Markle, making it the perfect unique pick for her wedding day. 

The Greville Emerald Kokoshnik tiara is another rare piece from the royal family jewel collection and you may recognize it as the piece that Princess Eugenie wore for her wedding in 2018. Featuring pavé diamonds and more than 90 carats of emeralds, jewelry expert Maxwell Stone told InStyle in 2025 that it's estimated worth is around $13 million. It was originally made for British socialite and philanthropist Dame Margaret Greville in 1919 and was later given to Queen Elizabeth II. However, it reportedly made its first public appearance at Princess Eugenie's wedding. Queen Camilla also wore it years later for a diplomatic event.

The Delhi Durbar Emerald choker is a vibrant necklace from the Delhi Durbar Parure. While it was initially created for Queen Mary in 1911, Princess Diana is one of its most famous wearers. Queen Elizabeth II gave it to her as a gift after her wedding to King Charles III (then Prince Charles). Created in the art deco style, in today's currency this piece has an estimated worth between about $17 million to $26 million, based on jewelry expert Max Stone's assessment to Express. Years after Diana was photographed wearing the stunning necklace, Catherine, Princess of Wales wore it to 2022's Earthshot Prize Awards Ceremony.

Catherine, Princess of Wales dusts off priceless royal jewels often, and one occasion she did so was a formal National Portrait Gallery reception in 2014. It was there she wore the Nizam of Hyderabad necklace, which was originally a wedding gift for Queen Elizabeth II in 1947 from the Nizam of Hyderabad and boasts over 50 diamonds. Based on jewelry expert Stephanie Tyler's assessment to Express in 2025, this piece is worth approximately $94 million (as of writing, based on inflation). While 2014 was the first time Kate Middleton wore this necklace, she wore it again for a diplomatic event in 2019.

Queen Elizabeth II's Cullinan III and IV brooch, which she affectionately called "Granny's Chips," is a mesmerizing brooch cut from one of the world's largest diamonds, the Cullinan. Historically, it belonged to Queen Mary and was one of her most prized possessions that she wore to her son's (Elizabeth II's father) coronation. While the exact value isn't known publicly, due to the massive carat size of the diamonds and its association with the British royal family, an estimate from The Guardian values it at over $263 million in today's currency.

It should come as no surprise that the Imperial State Crown is number one on this list. It's hard to put a price on this very special occasion-only headwear, but some estimate it could be anywhere from around $3.7 to 6.3 billion, based on inflation as of writing (via Gem Society). While King Charles III is the latest wearer, it's been worn by British monarchs since 1937 for coronations and the annual State Opening of Parliament. The crown is made of gold and set with a whopping 2,868 diamonds, 17 sapphires, 11 emeralds, around 270 pearls, and four or five rubies (per Historic Royal Palaces).