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1900 CE
1910 CE
1920 CE
1930 CE
1940 CE
1950 CE
1905 CE: The Cullinan diamond is discovered in Transvaal, South Africa.
1907 CE: The Cullian diamond is presented to Edward VII of England for his 66th birthday.
1908 CE: Joseph Asscher and Company of Amsterdam cut the Cullinan diamond into 9 large stones and 96 smaller gems.
1908 CE: The Cullinan I and II diamonds are presented to Edward VII.
1910 CE: The Cullinan II diamond is set into the Imperial State Crown of the British Crown Jewels.
1910 CE: The South African government presents the Cullinan III-IX diamonds to Queen Mary, consort of George V.
1911 CE: The Cullinan I diamond is added to the Sovereign's Sceptre of the British Crown Jewels.
1953 CE: Queen Mary, consort of George V, bequeaths the Cullinan diamonds III-IX to Elizabeth II.