When Prince Rainier III first proposed to Grace Kelly, he did so with a Cartier eternity band of rubies and diamonds. But when he saw other starlets in Hollywood sporting flashier pieces, he quickly reconsidered his original offering. The new ring, also by Cartier, would feature a 10.5-carat, emerald-cut diamond, flanked by two baguettes. The gi ing of the ring would not only signify the start of their 26-year marriage but a long-standing relationship between Princess Grace and Cartier. It is for this reason that Cartier was the jeweller of choice to recreate some of the princess’s most iconic pieces for Olivier Dahan’s film Grace of Monaco.