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Which British royal tiaras are estimated to be the most expensive?
The following order comes from a 2026 Marie Claire feature that consulted Justin Daughters, managing director and antique-jewelry expert at Berganza. It ranks five tiaras worn at royal weddings. The estimates for places three through five overlap, so their order reflects the feature’s ranking, not a definitive ordering that holds at every point in each range.
| Rank in the 2026 feature | Tiara | Estimated value | Notable royal wedding connection |
|---|---|---|---|
| 1 | Greville Emerald Kokoshnik | £10 million–£13 million | Princess Eugenie, 2018 |
| 2 | Queen Mary’s Fringe Tiara | £5 million–£9 million | Queen Elizabeth II, 1947; Princess Beatrice, 2020 |
| 3 | Queen Mary’s Diamond Bandeau Tiara | £2 million–£5 million | The Duchess of Sussex, 2018 |
| 4 | Meander Tiara | £2 million–£4 million | Zara Tindall, 2011 |
| 5 | Cartier Halo Tiara | £1 million–£2.5 million | Catherine, Princess of Wales, 2011 |
1. Greville Emerald Kokoshnik Tiara
2026 estimated value: £10 million–£13 million. Boucheron made the tiara in 1919 for society hostess Dame Margaret Greville. She left her jewels to the Queen Mother, and the tiara later entered Queen Elizabeth II’s collection. Princess Eugenie wore it at her 2018 wedding; Queen Camilla wore it at a 2025 Diplomatic Corps reception, according to the 2026 feature.
The center cabochon emerald is reported to weigh 93.7 carats. The feature describes six smaller emeralds as well, but descriptions differ on whether that count includes the center stone, so a total count is not stated here. Daughters links the estimate to the stones, craftsmanship and royal provenance, rather than to gemstone size alone.
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A 2021 estimate by Steven Stone placed the tiara at £10 million. That figure is an earlier expert estimate, not an official appraisal or an insurance premium; the 2021 study selected three recently worn royal wedding tiaras and used diamond experts for valuations. Money.co.uk’s account of the study and Steven Stone’s description of its method provide that earlier context.
2. Queen Mary’s Fringe Tiara
2026 estimated value: £5 million–£9 million. Garrard made the tiara in 1919 using diamonds from a necklace given to Queen Mary in 1893. Queen Elizabeth II wore it at her 1947 wedding to Prince Philip, and Princess Beatrice wore it at her 2020 wedding.
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The 2026 feature reports that the tiara broke shortly before Elizabeth’s wedding and needed repair. It attributes the estimate to the antique diamonds, workmanship and provenance. Steven Stone’s 2021 estimate was £5 million, using the study’s expert-valuation method rather than an official collection appraisal.
3. Queen Mary’s Diamond Bandeau Tiara
2026 estimated value: £2 million–£5 million. The Royal Collection Trust records that the diamond-set platinum bandeau was made for Queen Mary in 1932. Its geometric design consists of eleven flexible sections, with a detachable brooch of ten diamonds at the center. Queen Elizabeth II lent it to the Duchess of Sussex, who wore it at her 2018 wedding.
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The Royal Collection Trust’s object record documents its construction and history. Steven Stone’s 2021 estimate was £2 million; the later range comes from the 2026 feature and should not be read as a formal valuation by the Trust.
4. Meander Tiara
2026 estimated value: £2 million–£4 million. Zara Tindall wore the tiara at her 2011 wedding. The 2026 feature traces its family history through Princess Anne, Queen Elizabeth and Princess Alice of Greece and Denmark, and describes a Greek-key pattern with laurel-wreath and honeysuckle motifs. Daughters points to provenance, proportions and design rarity as factors in its estimated value.
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5. Cartier Halo Tiara
2026 estimated value: £1 million–£2.5 million. Catherine, Princess of Wales, wore the tiara at her 2011 wedding. The 2026 feature says Cartier created it in 1936 with 739 brilliant-cut diamonds and 149 baguette-cut diamonds. It traces the tiara from George VI’s purchase for the then Duchess of York to Queen Elizabeth II and Princess Margaret. Its public profile rose substantially after Catherine wore it.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why tiara estimates are not the same as prices
A valuation depends on what is being estimated and why. The 2026 ranges are expert estimates reported by a magazine, not disclosed sale prices or official Royal Collection Trust appraisals. The separate 2021 figures were estimates from a study of three wedding tiaras; Money.co.uk discussed insurance costs separately, so those valuations should not be presented as actual premiums.
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As Daughters explained in the 2026 feature, “the primary factors determining the gem’s value are not limited to the diamonds and precious stones composing the tiara.” Rarity, workmanship, provenance and a piece’s connection to a royal occasion can all matter. Those qualities help explain why a tiara’s historical importance and public fame do not, by themselves, establish a current market value.
There is also a custody distinction. The Royal Household explains that the Sovereign holds the Royal Collection on behalf of the nation and cannot sell it. That status does not provide a current appraised value for each jewel.
Other famous tiaras without comparable current estimates
A five-piece wedding-tiara list is not an exhaustive ranking of the Royal Family’s tiaras. Two prominent examples show why historic importance should not be mistaken for a comparable modern valuation:
- Vladimir Tiara: Made for Grand Duchess Vladimir around 1874, it was sold by her daughter to Queen Mary in 1921. The Royal Collection Trust notes that its pendant emeralds can be removed or replaced with pearls, but the sources cited here do not provide a current value. See the Royal Collection Trust record.
- Diamond Diadem: Made for George IV’s 1821 coronation and set with 1,333 diamonds. The Royal Collection Trust records an original cost of £8,216, including an £800 diamond-hire charge. That is a historical account of the order, not a modern valuation. See the Royal Collection Trust record.
A real auction estimate offers a different kind of comparison. Christie’s estimated Princess Margaret’s Poltimore Tiara at £150,000–£200,000 in 2006. It could also be worn as a diamond fringe necklace and as scroll brooches. That is a historic auction estimate, not a current expert replacement or insurance estimate. See Christie’s sale material.
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