The most expensive royal engagement ring belongs to Grace Kelly, the Hollywood actress who became Princess of Monaco. Kelly’s Cartier ring was given to her by Prince Rainier III in 1956.

The most expensive royal engagement ring belongs to Grace Kelly, the Hollywood actress who became Princess of Monaco. Kelly’s Cartier ring was given to her by Prince Rainier III in 1956.

Princess Diana’s iconic engagement ring is one of the most recognizable pieces of royal jewelry in the world. Given to her by Prince Charles in 1981, the ring features a stunning 12-carat oval ...