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The weight of a diamond is measured in carats. One carat is 0.20 grams, thus a 5.00 carat diamond would be the equivalent of 1 gram. A carat is divided into 100 "points".
In 1871 a giant diamond measuring 83,5 carat was found on the De Beer brothers' farm in South Africa. This was the beginning of the Worlds' first diamond fever and the beginning of the Kimberley mine.
During the first 40 years of the Kimberley mine, 50,000 miners used picks and shovel to penetrate deep into the ground and created what they refer to as The Big Hole, measuring 240 meters deep and 463 meters in diameter. They continued excavating down to 1,097 meters. Fortunately, their efforts weren't in vain, as 2,772 kilograms of diamonds (14 million carats) were discovered there from 1871 to 1914.