True to her impeccable style, she wore a custom Alexander McQueen spring/summer 2025 draped skirt suit.
However, it was her striking amethyst necklace that captured the attention of royal watchers.
Once part of an opulent parure - comprising a tiara, necklace, earrings and a brooch - the piece traces its origins to Queen Charlotte, wife of King George III.
The collection was passed down to Queen Charlotte's daughter,
Princess Charlotte, who married Frederick I, King of Württemberg. Although the couple had no children together, Frederick had a son, William, from a previous marriage.
William's daughter, Catherine, was a cousin of
Queen Mary's father, the Duke of Teck. In 1898, she bequeathed the parure to Mary.
The amethyst parure went up for auction at Sotheby's Geneva in May 1993 with an estimated value of $75,000-$125,000.
The set sold for £55,357 to an anonymous buyer. It later resurfaced at the London Grosvenor House Antiques Fair, listed for £150,000, before being sold once again.
It appears that Anna Wintour may have acquired the necklace, as she was seen wearing it at the Golden Age of Couture party at London's V&A Museum in 2007.
The legendary editor-in-chief of American Vogue was made a Companion of Honour in the 2023 King's Birthday Honours list for her contributions to fashion.
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