Where is the Princess of Wales' engagement ring? It's been a question on royal fans' lips over the past few weeks, ever since ...

The sapphire, encircled by 14 solitaire diamonds ... a rosebud in honor of her middle name Rose and the sentimental engagement ring was set in platinum on a yellow gold band. Armstrong-Jones knew this ...

Princess Diana picked her 12-carat sapphire and diamond engagement ring. Prince William proposed to Kate Middleton with the same ring.