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The two gems were loved by Queen Mary, wife of King George V, In 1911, she had Cullinan III, a pear-shape drop of 94.40 carats, and Cullinan IV, a cushion-shape stone of 63.60 carats, mounted temporarily in a lattice-work setting and placed into her new crown made by Garrard for the coronation.

The following year, the Delhi Durbar Tiara was adapted to hold both stones. Cullinan III and IV were occasionally used as a pendant to the Coronation Necklace in place of the Lahore Diamond.

However, the stones were most often worn hooked together as a pendant brooch, which is why the brooch is typically referred to as “Granny’s Chips.” She wore the brooch to important family events, including her children’s weddings, the 1937 coronation of her son George VI, and her grandaughter Princess Elizabeth’s

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