The 11 Most Stunning Brooches in the Royal Vaults

The unusual heart-shaped stone is supported in a web of platinum and brilliant-cut diamonds (multi-faceted round stones), and was designed to be used in many different ways — perhaps most significantly by Queen Mary when it was clipped into her Queen Consort's Crown. It was given to the Queen in the year of her coronation, but she has only ever worn it as a brooch, including for assorted daytime receptions, a trip to Tuvalu, and her Christmas broadcasts in 1981, 1999 and 2008.