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The largest pink diamond previously mined by Alrosa weighed 3.86 carats, one of a total of only three others that the company has mined of over two carats each during the past eight years. The gem is reported to be of jewelry quality, measuring 22.47 x 15.69 x 10.9 millimetres, with a saturated pink tone and practically no defects, according to ...
The discovery of two large rough white diamonds was announced in November 2010. [8] They weighed 39.2 grams (196 carats) and 36.8 grams (184 carats). [9] The Lesotho Legend, the 910-carat diamond recovered in January 2018
The stone was of 33 carats (6.6 g). It was sold for 66 pounds and was later valued at $150,000. The stone would be worth more than $6 million today and is the purest red diamond in the world. The biggest diamond rush in history took place in March 1927 on the farm Grasfontein near Lichtenburg, when 25,000 runners took part to peg their claims.
It proved to be a 21.25-carat (4.3 g) diamond, and became known as the Eureka. Three years later, in 1869, an 83.5-carat (16.7 g) diamond, which became known as the Star of South Africa , was found nearby ( 29°3′S 23°58′E  /  29.050°S 23.967°E  / -29.050; 23
Carbonado, commonly known as black diamond, is one of the toughest forms of natural diamond. It is an impure, high-density, micro-porous form of polycrystalline diamond consisting of diamond, graphite , and amorphous carbon , with minor crystalline precipitates filling pores and occasional reduced metal inclusions. [ 1 ]
In addition, in gemstones, the state is the second largest national producer of diamond, having extracted 49,000 carats in the year 2017. The city of Juína is the main one in this activity in the state. The state also has a small production of sapphire and jasper. [24] [25]
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