Royal insiders are in a frenzy this week as fresh reports reveal that Queen Camilla was left absolutely “furious” after witnessing Catherine, Princess of Wales, arrive at a glittering state banquet wearing none other than Princess Diana’s iconic sapphire and diamond tiara — valued at a staggering £4 million.

The jaw-dropping moment occurred at Buckingham Palace during a grand gala hosted for foreign dignitaries. Catherine made a breathtaking entrance in a floor-length ice blue gown, her hair swept elegantly back to showcase the dazzling Spencer tiara, once famously worn by Diana on countless occasions — including her historic wedding to then-Prince Charles.

Witnesses say the atmosphere shifted dramatically the moment Catherine stepped into the ballroom. According to a palace aide, Queen Camilla’s smile visibly faltered when she caught sight of the sparkling heirloom perched atop Catherine’s head.

“It was as if someone had thrown a glass of cold water over her,” the source claimed. “She immediately leaned in to whisper to a lady-in-waiting, her expression tight and eyes narrowed.”

Palace insiders report that Camilla has long felt uneasy about the continued prominence of Diana’s personal jewels within royal circles. While officially the tiaras are part of the royal collection, privately, the Queen Consort is said to find it painful that Diana’s legacy so powerfully eclipses her own image in the public imagination.

One veteran courtier didn’t mince words:

“Camilla has worked tirelessly to rehabilitate her public standing. Seeing Catherine wearing the very tiara most associated with Diana reopened old wounds. It was a visual ghost of the past.”

Meanwhile, observers say Catherine appeared completely composed, greeting foreign leaders with warm handshakes and gracious smiles. Many guests and commentators were quick to praise her choice of headpiece as a “deeply symbolic tribute” that seamlessly blended royal tradition with heartfelt memory.

“Diana’s tiara isn’t just a piece of jewelry — it’s an emotional link between past and present,” noted royal historian Beatrice Walsh. “Catherine wearing it signals continuity, but also a delicate assertion of Diana’s enduring influence at the heart of the monarchy.”

The public certainly seems to agree. Social media platforms lit up with admiration, with posts like, “Catherine in Diana’s tiara — chills. The people’s princess lives on through her,” trending within minutes.

But inside palace walls, the mood was reportedly far less celebratory. A separate source revealed that after the banquet, Camilla retreated quickly to her private chambers and declined to attend a smaller supper that followed.

“She was rattled. There’s no other way to put it,” the insider confided.

For his part, Prince William was said to be “quietly proud” of his wife’s elegant tribute to his mother, brushing aside concerns of any tension. As for King Charles, ever eager to keep the peace, he is believed to be planning a series of private family discussions to soothe bruised feelings and reinforce unity.

Whether this glamorous — but apparently incendiary — choice by Catherine will lead to lasting friction remains to be seen. But one thing is certain: the legacy of Princess Diana continues to cast a long, glittering shadow over Britain’s royal family.