How Queen Camilla’s $10 million brooch gives sweet nod to Kate Middleton

Camilla pinned the brooch — which jewelry expert Maxwell Stone of Steven Stone Jewelers tells Page Six Style is “at least 40 carats” — to her blue coat dress Wednesday as she visited community groups and gave a speech in the city of Douglas.

The piece was commissioned by Prince Albert and presented to Queen Victoria on their wedding day in 1840, and per Stone, is worth “around £8 million” or $10.1 million.

Its similarities to the Princess of Wales’ engagement ring aren’t coincidental; the piece “is said to have inspired the design for Kate Middleton’s engagement ring, which was originally given to Princess Diana from Prince Charles,” the jewelry expert tells us.

Queen Camilla’s outing follows the news that the Princess of Wales’ health records were part of a security breach at The London Clinic, the hospital where she underwent abdominal surgery for an unknown condition in January.

The mom of three has also been plagued by multiple wild conspiracy theories during her absence from public life this year, with social media users accusing her of using a body double and more.

However, she was spotted at a farm shop in Windsor over the weekend, with a video showing her looking in good spirits as she walked alongside Prince William.