Koh-i-Noor

The Koh-i-Noor diamond currently weighs 105.6 carats, though it was originally much larger before being recut. Before its recutting in 1852, the diamond was reportedly estimated at 191 carats. Today, it remains one of the largest cut diamonds in the world.

The Koh-i-Noor is currently housed in the Tower of London as part of the British Crown Jewels. It is set in the front cross of the Crown of Queen Elizabeth The Queen Mother. It was last worn publicly during the Queen Mother's funeral in 2002.

The diamond formally entered British possession in 1849 following the annexation of Punjab. It was signed over to Queen Victoria under the Treaty of Lahore. The diamond was then brought to England and presented to the monarch, where it was put on display at the Great Exhibition of 1851.

Historically, the Koh-i-Noor was worn by various Indian, Mughal, Persian, and Sikh rulers as an armlet or turban ornament. Since entering British possession, it has been set in the crowns of British queens consort, specifically Queen Alexandra, Queen Mary, and Queen Elizabeth The Queen Mother. Due to a historical legend, it is traditionally only worn by female royals.