It was made in 1911 for the coronation of British queen Mary of Teck.

[6] In 1937, the year of George VI's coronation, the 18.8-carat (3.76 g), heart-shaped Cullinan V was first added to the crown in place of the Koh-i-Noor, which was removed for use on the Crown of Queen Elizabeth the Queen Mother.

[4] Alterations included re-setting the crown with the original Cullinan III and IV diamonds, as well as Cullinan V in place of the controversial Koh-i-Noor, as a tribute to Camilla's mother-in-law, Elizabeth II, who wore the diamonds as brooches.

The number of arches was reduced from eight to four and the crown fitted with a new purple velvet cap.

It was the first time since the 1700s a British queen consort reused the crown of a predecessor.