The largest rough diamond ever found on earth is the Carbonado do Sergio, discovered in Brazil in 1895. It weighs 273.85 carats and is the world’s largest flawless diamond. Golden Jubilee Diamond, discovered in 1986Īnother impressive diamond that also took 3 years to cut, and also is part of the British crown jewels, is the Centenary Diamond. It took an international team of expert cutters 3 years to complete the masterpiece. It weighs 545.67 carats and was cut down from a 755.5 carat rough diamond. The world’s largest documented polished diamond – unearthed in 1986, also in South Africa – is the Unnamed Brown called the Golden Jubilee Diamond. The Cullinan was three times the size of either of the next largest diamonds, the Lesedi La Rona (1111 carat – discovered in Botswana in 2015) and the Excelsior (970 carat – discover in South Africa in 1893).Ĭullinan Diamond, 0,62kg (one and a quarter pound) uncut, discovered in 1905 They now form part of the British crown jewels. It was cut into the Great Star of Africa, weighing 530.2 carats, the Lesser Star of Africa, which weighs 317.40 carats, and 104 other diamonds of nearly flawless color and clarity. The world’s largest non-carbonado diamond was the Cullinan, found in South Africa in 1905. If hit hard with a hammer, a diamond will shatter or splinter. It was only during the 15th century that it was discovered that the only way to cut diamonds was with other diamonds. Most diamonds are found in volcanic rock, called Kimberlite, or in the sea after having been carried away by rivers when they were pushed to the surface.Ī diamond is 58 times harder than the next hardest mineral on earth, corundum, from which rubies and sapphires are formed. Only a little carbon dioxide will have been released.ĭiamonds are formed over a period of a billion or more years deep within earth’s crust – about 150km (90 miles) deep – and is pushed to the surface by volcanoes. Home » did you know » Diamond facts Diamond factsĪ diamond is the hardest natural substance on earth, but if it is placed in an oven and the temperature is raised to about 763 degrees Celsius (1405 degrees Fahrenheit), it will simply vanish, without even ash remaining.
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