What is the largest diamond in the world Queen Elizabeth?
Queen Elizabeth II owned many precious diamonds, but the largest and most famous one was the Cullinan diamond. It was a part of the Cullinan diamond group, originally weighing 3106 carats. The largest piece cut from it, known as the 'Great Star of Africa' or 'Cullinan I', weighed 530.2 carats and was set in the British royal scepter.