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Just when you think you know everything about Prince William and Prince Harry’s feud, a royal insider sheds new light on when the rift began.

The royal siblings’ relationship reportedly began to break down at a crucial point in the Prince of Wales’ life, and at a time when Meghan Markle hadn’t even entered the picture. After Princess Diana’s death in 1997, Harry reportedly inherited her stunning 12-carat Ceylon sapphire engagement ring that was given to her by the then-Prince Charles in 1981.

The lore goes that Harry gave it to his brother ahead of his engagement to Kate Middleton in 2010, per Diana’s former butler Paul Burrell. But in Prince Harry’s

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