Be specific with your answer. Under the Treaty of Lahore, the Koh-i-Noor diamond was ceded by the Kingdom of Punjab to Queen Victoria. At a whopping 109 carats, the Koh-i-Noor remains in the British crown jewels, but is not part of the coronation regalia for the monarch. Who was the last person to wear the Koh-i-Noor as part of their crown, a crown which the public saw placed on her coffin during her 2002 funeral services.
(Elizabeth) the Queen Mother