Maxwell continued: “Princess Diana also famously had a blue sapphire ring, which is now in the hands of Kate Middleton, while the Queen is frequently seen sporting the gemstone on her famous brooches.”

But relating to engagement rings, Princess Anne didn’t take after her mom, Queen Elizabeth II, other than one key function.

Maxwell described HRH’s engagement ring from Prince Philip as “breathtaking”.

While Princess Anne’s sparkler includes a 3ct sapphire, the Queen’s is a 3ct spherical solitaire diamond.