The sentimental history behind Kate Middleton’s gold shamrock brooch

Kate Middleton (opens in new tab) stunned in a gorgeous teal look for this week's St Patrick's Day celebrations, but did you notice the small sentimental brooch pinned on her lapel? 

• Kate Middleton wore a small gold shamrock brooch for her St Patrick's Day engagement earlier this week, an accessory that holds history for not only her, but the entire royal family.
• As well as being worn by both Princess Anne and the Queen Mother before her, this sentimental brooch was worn by Kate on her first ever official royal engagement.
• In other royal news (opens in new tab), The ‘affordable’ accessory Kate Middleton relies on to make 'simple outfits' look 'exciting' (opens in new tab).

While Kate Middleton deviated from traditional St Patrick’s Day fashion for this year's celebrations, stepping out in a bold teal coat as opposed to the traditional green, she did adhere to one sentimental royal custom. The small detail, a gold shamrock brooch pinned to her lapel, may have gone unnoticed by many, but it holds a lot of history for the royal and the wider family, referencing back to many royals before her.

The golden brooch has been spotted on many royals, including the Queen Mother and Princess Anne, but the accessory isn’t thought to belong to the royal family at all. This is because, according to the royal family jewellery website, the Court Jeweller, the brooch actually belongs to the Irish Guards, the group Kate was honouring at her St Patrick’s appearance.

The Court Jeweller website explains that the Irish Guards brooch "is loaned out to royal ladies who are associated with the regiment." The brooch is officially known as the Irish Guards Brooch and features a single emerald set in the centre of its gold leaves. 

The brooch may not belong to Kate, but it holds sentimental value for the royal. The brooch was donned by the Princess of Wales for her very first official engagement as a royal in 2011, according to jewellery expert Maxwell Stone, who also says the brooch has an estimated worth around $3K thanks to its 18K carat gold. 

Since the first time she wore the shamrock design, Kate has been the only royal to sport it and has proudly worn the brooch on St Patrick’s Day every single year.

While something as simple as a brooch may not appear all that exciting, the Irish Guards brooch does have some mystery surrounding its origin. Some historians cite Queen Alexandra, who began the custom of royals handing out of actual shamrocks to the Irish Guard, as the first owner of the brooch. This makes sense as royals today who carry out this custom wear the same brooch. 

However, in the book Up the Micks! An Illustrated History of the Irish Guards by James Wilson, which features a foreword written by Prince William, the brooch is given another origin story. Wilson reports that the brooch was crafted by the iconic jewellers Cartier and then presented to Princess Mary, the Princess Royal and Aunt of Queen Elizabeth II, by the Irish Guards regiment in 1961.

When Princess Mary died, Wilson says the brooch was purchased by the regiment at an auction where the tradition of the Irish Guards loaning the piece out to royal ladies was born. 

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