Why Princess Kate repeated her favourite jewellery at Wimbledon 2026, inspired by Princess DianaPrincess Kate impressed royal watchers with three elegant looks during Wimbledon 2026, but it wasn't just her outfits that sparked conversation. According to a jewellery expert, the Princess of Wales' decision to repeatedly wear some of her favourite pieces could be part of a long-term style strategy inspired by her late mother-in-law, Princess Diana.Over three days at the Championships, Kate stepped out in a blue trouser suit, a vintage-inspired red peplum dress and a flowing green midi dress with cape detailing. While each outfit was brand new, she paired them with jewellery she has worn many times before, including her Van Cleef & Arpels earrings, lapis and moonstone drop earrings, and her increasingly favoured ruby and diamond set.Princess Kate is creating a signature jewellery styleSpeaking to Marie Claire, jewellery expert Nilesh Rakholia, founder of Abelini, said Wimbledon is exactly the kind of high-profile event where public figures rely on familiar accessories instead of debuting new ones."Wimbledon isn't just another engagement, it's tradition, and for the Princess of Wales specifically, it comes with a particular kind of scrutiny," Rakholia said.Because the tournament is watched by millions around the world, he explained, it comes with "a very different kind of pressure than an ordinary public appearance.""It's exactly the kind of occasion where people reach for what's proven rather than what's new," he added.Kate has long been known for rewearing jewellery from brands such as Van Cleef & Arpels, Kiki McDonough, Cartier, Daniella Draper and Spells of Love. Rakholia believes this repeated use of the same pieces helps build a recognisable personal style over time.Princess Diana did the sameRakholia told the publication that Princess Diana became instantly associated with certain pieces because she wore them consistently for years."Think about Princess Diana," he said. "Mention her name and certain pieces come to mind almost instantly: her sapphire engagement ring, the pearl choker she wore so often it became part of her visual identity.""That association wasn't built in a single appearance, it took years of repetition."Could rubies become Princess Kate's signature?According to Rakholia, Kate's ruby jewellery may be following the same path."I think we may be watching the early stages of the same thing happen with Kate and her ruby pieces," he said. "It's still early days by comparison, but the same quiet, cumulative process that made certain jewellery inseparable from Diana's image seems to be underway."Kate first wore her G. Collins & Sons ruby pendant during a 2017 royal tour of Poland. The necklace, surrounded by a diamond halo, bears a striking resemblance to her sapphire engagement ring, which originally belonged to Princess Diana.This summer, the Princess has been wearing the ruby pendant and matching earrings more often, including at a Cancer Research UK reception before Wimbledon.A sweet link to Prince GeorgeThere may also be a personal reason behind Kate's recent choice of gemstones. Rubies are the birthstone of Prince George, who is set to celebrate his 13th birthday next week. While Kensington Palace has not commented on the significance, the timing has led some royal watchers to wonder whether the jewellery choice is also a subtle tribute to her eldest son.