Size Does Matter: 25 Most Expensive Engagement Rings

5. Grace Kelly

10.47 carat Emerald-cut diamond

Price: $4.06 million

Grace Kelly’s whopping 10.47 carat emerald cut diamond engagement ring from Prince Rainier III of Monaco is undoubtedly stunning, however, the Prince had originally popped the question with a much more modest ring.

The breathtaking ring, which now has an estimated value of $4.3 million, was later became the her character’s engagement ring in the film High Society specifically because she was never supposed to take it off.