Magic, passion and possession: the great history of diamonds joins that of humanity, as this stone symbolizes a quest for the absolute. In 1866, in Hopetown, 120 kilometers south of Kimberley (South Africa), the Eureka diamond (so named at the Paris Universal Exhibition the same year) was discovered by a young boy, Erasmus Jacobs, in a kimberlite. The largest diamond ever found on the planet is the Cullinan. The gemstone was 3,106 carats and had been discovered in South Africa in 1905. Howard Tracy Hall (born October 20, 1919 and died July 25, 2008) was an American physical chemist and the first person who invented a synthetic diamond according to a reproducible, verifiable and witnessed process, using a press of his own invention.