Cullinan II, weighing 365,438+07.4 carats, is embedded in the crown of the royal empire and worn by the Queen of England to attend the annual opening ceremony of the British Parliament. 190565438+1On October 25th, Cullinan diamond was discovered 9 meters underground in Primia mine, South Africa, which is the largest natural diamond found in the world.

Only in February of 1908, Arthur brothers cut Cullinan diamond into 9 large diamonds and 96 small diamonds, among which Cullinan No.1, also known as "Star of Africa", weighed 530.2 carats and enjoyed the reputation of "the best in the century".