British Royal Jewels: Cullinan IX Ring

The smallest of the nine numbered stones is a pear-shaped diamond weighing 4.4 carats set in a ring with a claw setting. Cullinan IX is also the only one cut in a form known pendeloque, or stepped pear-shape.

Cullinan IX diamond set into a platinum ring

In 1911, Queen Mary commissioned Garrad & Co to set the stone into a platinum ring, in which form it has remained ever since. Queen Elizabeth inherited the ring, along with the other Cullinans, upon Queen Mary’s death in 1953.