The "Star of Africa," also known as the Cullinan Diamond, is the largest gem-quality diamond ever discovered, weighing an impressive 3,106 carats. It was found in 1905 at the Cullinan Mine in South Africa and was named after Sir Thomas Cullinan, the mine's owner. The diamond was later cut into several smaller gems, the most famous being the Great Star of Africa, which is part of the British Crown Jewels. The Great Star of Africa, weighing 530.2 carats, is the largest cut diamond in the world. It is set in the Sceptre with Cross, one of the key pieces in the British royal regalia. The diamond's discovery and subsequent cutting have made it a significant symbol of both natural beauty and historical controversy surrounding colonialism.