From historic heirlooms to custom designs, modern royal women wear some of the most incredible (and expensive ... Eugenie's ring is beautifully unique and a departure from the blue sapphires ...

Celebrity engagement rings continue to fascinate fans by the sheer size and cost of these tokens of love. But who's worn the most expensive?

which reveals those with the greatest value and most rare stones. The Princess of Wales: Value: £500,000+ Ring: Originally Princess Diana's engagement ring, the 12-carat oval-cut Ceylon blue ...

Another thing he did well with: the ring. Bloom proposed with a floral-inspired engagement ring that experts estimate could be worth up to $5 million, making it one of the most expensive celebrity ...

"Whilst it may appear a little understated in comparison to Kate's ring, it exudes the class and quality befitting a Queen." Coming in with the third-most expensive royal ring is the Duchess of ...