“I don’t believe an engagement ring has to be a diamond. Anything you find beautiful—a perfect single pearl, so chic—is right ...

The Garrard sapphire and diamond engagement ring was originally purchased by Charles for Diana in 1981 for their engagement. It cost a reported £28,000 and is now valued at upwards of £300,000.

The princess also wore diamond and cabochon ... As for Eugenie’s engagement ring, she has the rarest one among royals. It features padparadscha sapphires, which are rarer than diamonds.

Over the last couple of years, engagement ring styles have slowly transitioned from delicate and dainty to bold and unique.