The Diamond Diadem, crafted in 1820 for George IV, is one of the most iconic and frequently seen pieces in the British Royal collection. This exquisite headpiece is steeped in history, craftsmanship, and symbolism, making it a centrepiece of Royal regalia.
Standing 7.5 cm tall, the diadem features a stunning design incorporating four crosses pattée alternating with four sprays of British flowers – the English rose, the Irish shamrock, and the Scottish thistle. Its band, composed of openwork diamond scrolling, is framed by two rows of magnificent pearls, giving it a regal yet intricate aesthetic.
The Diamond Diadem was made in 1820. (Royal Collection Trust/His Majesty King Charles III 2024)
The diadem is composed of a remarkable 1,333 diamonds, including a four-carat pale yellow brilliant stone prominently placed at the centre of the front cross. This distinctive gem helps identify the front of the diadem. The piece was crafted by the jewellers Rundell, Bridge & Rundell, likely designed by their chief designer, Philip Liebart. It was initially intended to serve as a contemporary version of the Imperial State Crown.
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For his Coronation in 1821, King George IV wore the diadem over a large velvet ‘Spanish’ hat during the ceremonies at Westminster Hall and the walking procession to Westminster Abbey. The Lord Chamberlain’s Office received an impressive bill for the piece, totalling over £8,200 — equivalent to approximately £700,000 today. Of this sum, £800 was allocated for the hire of the diamonds used, which are believed to remain intact and undisturbed in the diadem. It is thought that George IV exchanged some of his own stones for those in the diadem.
The diadem has been a staple of Royal tradition, regularly worn and slightly modified by subsequent queens regnant and consorts since Queen Adelaide. It has played a significant role in the pageantry and public image of the Monarchy. The diadem is a staple at State Openings of Parliament, and has been used for many photographs over the decades, including those used on British and Commonwealth coins, paper money and stamps.
Elizabeth II first wore the diadem at the State Opening of Parliament in November 1952, following her accession just a few months prior, marking the beginning of her reign. It was also prominently worn during her journey to Westminster Abbey for her Coronation in 1953. Since then, the diadem has become synonymous with her appearances at State Openings of Parliament. Over the decades, it has also featured in numerous portraits and photographs, gracing British and Commonwealth coins, paper money, and postage stamps, further cementing its place in Royal iconography.
Queen Camilla first wore the Diamond Diadem at the State Opening of Parliament on 7th November 2023.
The Diamond Diadem, designed for George IV’s coronation, is set with 1,333 diamonds. The Queen wears the circlet to and from the State Opening of Parliament. (Royal Collection Trust / © Her Majesty Queen Elizabeth II 2020)
The Diamond Diadem has been displayed on several occasions, offering the public a rare opportunity to admire its craftsmanship up close. It was featured in a special exhibition at Buckingham Palace to commemorate the Platinum Jubilee in 2022, following a previous display during the Diamond Jubilee in 2012. The diadem was also scheduled to be part of an exhibition on George IV at The King’s Gallery in 2020, though plans were impacted due to the COVID pandemic.
Queen Camilla wearing the diamond diadem for 2023’s State Opening of Parliament. (Defence Imagery)
This remarkable piece remains an enduring symbol of the British monarchy’s grandeur, a testament to the artistry of its makers and the historical moments it has witnessed.
