Greville Tiara

Summary
Known alternately among royal watchers as "The Mighty Bouch" or the "Boucheron Honeycomb," it is referenced officially in the Royal Collection simply by the name of the benefactor. Mrs. Greville bequeathed it to Queen Elizabeth the Queen Mother. Ergo, it is the Greville Tiara. It was called Boucheron, or Bouch, for short because Boucheron was the maker in 1921; and the motif has a "honeycomb and lozenge design," hence the other common reference. It was originally made for Mrs. Greville, of course, and it had a "kokoshnik" style. Mrs. Greville died in 1942, leaving the tiara to then Queen Elizabeth. In 1953, the newly styled Queen Mother sent it to Cartier to refashion it. It was then that the marquise stone was added at the top and in the center.

When the Prince of Wales married Camilla Parker Bowles in 2005, the Greville tiara was loaned to her on a long-term basis. Known as the Duchess of Cornwall, Camilla wore the Greville tiara for the first time at a state banquet in 2006.