Queen Camilla’s Dazzling Diamond Christmas Brooch

King Charles III and Queen Camilla led a large contingent of family members—children, grandchildren, siblings, nieces and nephews, and cousins—for the annual walk to church at St. Mary Magdalene near the Sandringham estate on Christmas Day.

For the church service, Queen Camilla wore dark blue: a coat by a favorite designer, Anna Valentine, with matching accessories, including an eye-catching feathered hat by Philip Treacy.

Queen Camilla’s jewelry for the day was a combination of the familiar and the possibly new. She wore her favorite diamond and pearl drop earrings with a brooch that I don’t believe we’ve seen her wear before.

She also appears to have worn a necklace with a blue pendant featuring an interlocking design. (Hearts, I think?) The necklace was hidden beneath her coat in most photographs from the day, but it peeked out as she left the church following the service. At first I wondered whether it might be a zipper pull featuring a logo (Anna Valentine, hearts, etc.), but I’m not sure it’s not a separate piece, as a pull isn’t visible in any other photographs.

But really, it’s the brooch that we’re here to talk about. The piece is a rectangular, badge-like jewel set with diamonds. The design of the piece makes me think that it may date to the Art Deco era of the early 20th century, and if so, it may be set in platinum.

The design of the brooch features four triangular panels set with diamonds, with a large stone set where the panels join together. It’s so encrusted with diamonds that it is difficult to make out all of the details of the piece in these outdoor photographs.

I’ve seen speculation online that the brooch may have come from the collection of the late Queen Elizabeth II or that of the Queen Mother, but if so, I’m not familiar with it. Perhaps it could also be another new (antique) acquisition?