Sewelô
The Sewelô diamond is the third-largest rough diamond ever found. The diamond was recovered in April 2019 by the Lucara Diamond Corp in its Karowe diamond mine in Botswana. The diamond is 1,758 carats and weighs 352 grams or 12.39 oz. 

The "Sewelô" is the largest diamond in Botswana’s history, surpassing the 1,111 carats (222 g, 7.83 oz.) Lesedi La Rona extracted at the same mine on 16 November 2015. The Lesedi La Rona was the fourth-largest diamond ever found, and the third-largest of gem quality.

The gem was named through a competition held by Lucara. Out of 22,000 submissions the name "Sewelô" was chosen, which translates 'rare find' in Setswana. In January 2020 it was announced that Louis Vuitton had purchased the diamond for an undisclosed sum. Louis Vuitton will work with the HB Company in Antwerp to polish the diamond and cut it into smaller stones.

The stone is covered with a thin layer of opaque black carbon and its surface is pitted. It is the size of a tennis ball but weighs six times more. The HB Company has applied novel mapping methods using artificial intelligence in order to optimise the design and to maximize the chance of success in cutting the diamond. The diamond has been described as a "near-gem of variable quality, including domains of high-quality white gem", an industrial diamond with sections that could produce gem-quality stones. Further analysis was in progress as of April 2021.
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diamond
Concept
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third-largest rough diamond
UNK
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Lucara Diamond Corp
ORG
None
Karowe diamond mine
UNK
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Botswana
LOC
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carats
Concept
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gram
Concept
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Lesedi La Rona
MISC
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Setswana.
Concept
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Louis Vuitton
ORG
None
HB Company
UNK
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Antwerp
LOC
None
polish the diamond
UNK
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cut it into smaller
Concept
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black carbon
UNK
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tennis ball
Concept
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artificial intelligence
Concept
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Sewelô
LOC
Q83387365
Sewelô
LOC
Q83387365
Sewelô
LOC
2019-04-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
April 2019
DATE
2015-11-16T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
16 November 2015
DATE
2020-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
January 2020
DATE
2021-04-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
April 2021
DATE
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12.39
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222
NUMBER
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7.83
NUMBER
country of origin
time of discovery or invention
owned by