According to The List's survey, an overwhelming majority voted for Kate Middleton's sapphire ring as their favorite royal engagement ring. 70% of voters favor the Princess of Wales' beautiful ring, a family heirloom that once belonged to her mother-in-law, Princess Diana. According to Vogue, the ring was inspired by a sapphire brooch that was worn by Queen Victoria in 1840 and was passed down to Queen Elizabeth II. King Charles III proposed to Princess Diana with a ring that was modeled after the sapphire brooch that captivated everyone with its unique beauty — sapphires are a huge hit with the royal family.

Kate Middleton almost didn't get Princess Diana's iconic engagement ring, because it was initially given to Prince Harry after his mother's death. But when William was ready to propose to his soon-to-be wife, Harry generously gifted the ring to his brother (per Marie Claire). One commenter on The List's YouTube survey said it perfectly, "All of them are beautiful in their own unique ways, but Katherine's sapphire ring is, hands down, my favorite. It was Diana's and seeing it on Katherine just has this sentimental, touching and loving feeling to it. And it looks good on her too."

In second place with 15% of the vote was Queen Elizabeth II's diamond ring. Brides reported that her three-carat diamond was "sourced from a tiara that once belonged to Prince Philip's mother." How romantic!