Botswana Says Huge 2,492-carat Diamond Uncovered at Mine

FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo
FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo
TT
20

Botswana Says Huge 2,492-carat Diamond Uncovered at Mine

FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo
FILE PHOTO: Diamonds are displayed during a visit to the De Beers Global Sightholder Sales (GSS) in the capital Gaborone in Botswana, November 24, 2015. REUTERS/Siphiwe Sibeko/File Photo

Botswana says one of the largest diamonds ever found has been unearthed at one of its mines and will be put on show on Thursday.
The Botswana government believes the huge 2,492-carat stone is the biggest discovered in the country, and the second-biggest ever brought out of a mine.
Canadian mining company Lucara Diamond Corp. said in a statement Wednesday that it recovered the “exceptional” rough diamond from its Karowe Mine in western Botswana. Lucara said it was a "high-quality" stone and was found intact. It was located using X-ray technology.
The weight would make it the largest diamond found in more than 100 years and the second-largest ever dug out of a mine after the Cullinan Diamond discovered in South Africa in 1905, The Associated Press reported. The Cullinan was 3,106 carats and was cut into gems, some of which form part of the British Crown Jewels.
A bigger black diamond was discovered in Brazil in the late 1800s, but it was found on the surface and was believed to have been part of a meteorite.
Botswana is the second biggest producer of diamonds and has unearthed all of the world's biggest stones in recent years.
Before this discovery, the Sewelo diamond, which was found at the Karowe Mine in 2019, was recognized as the second-biggest mined diamond in the world at 1,758 carats. It was bought by French fashion house Louis Vuitton for an undisclosed amount.
The 1,111-carat Lesedi La Rona diamond, also from Botswana's Karowe Mine, was bought by a British jeweler for $53 million in 2017.



Strange Foam and Dead Fish Wash Ashore at 2 Australian Beaches as Surfers Fall Sick 

This image made from video provided by Australian Broadcasting Corp., shows foam washing up on beach Monday, March 17, 2025, in Waitpinga, near Adelaide. (Australian Broadcasting Corp via AP) 
This image made from video provided by Australian Broadcasting Corp., shows foam washing up on beach Monday, March 17, 2025, in Waitpinga, near Adelaide. (Australian Broadcasting Corp via AP) 
TT
20

Strange Foam and Dead Fish Wash Ashore at 2 Australian Beaches as Surfers Fall Sick 

This image made from video provided by Australian Broadcasting Corp., shows foam washing up on beach Monday, March 17, 2025, in Waitpinga, near Adelaide. (Australian Broadcasting Corp via AP) 
This image made from video provided by Australian Broadcasting Corp., shows foam washing up on beach Monday, March 17, 2025, in Waitpinga, near Adelaide. (Australian Broadcasting Corp via AP) 

An Australian state closed two beaches after dead fish and an unusual off-white foam washed ashore while surfers reported feeling unwell, officials said on Tuesday.

A microalgal bloom created by unusual weather conditions was suspected to have sickened humans and marine life as well as creating the foam that has covered hundreds of meters (yards) of coastline, South Australian Environment Protection Authority principal scientific officer Sam Gaylard said.

“It is very concerning,” Gaylard told Australian Broadcasting Corp.

“It is unusual at this scale. At this time of year, when the weather conditions allow, we do occasionally get isolated blooms, but something of this scale is definitely a little bit unusual,” Gaylard added.

Waitpinga Beach and neighboring Parsons Beach, both south of the South Australia state capital Adelaide, have been closed to the public since Monday in response to a “fish mortality event in the area,” the Department for Environment and Water said in a statement.

“The beaches will be re-opened as soon as possible,” the department said.

Dozens of dead fish have reportedly been washed ashore.

Surfers have been complaining since the weekend of getting sore eyes, sore throats and coughing after contact with the water, said local Anthony Rowland, who surfed at Waitpinga on Saturday.

“While we were out there, we started coughing,” Rowland said, referring to his surfing comrades. He said he was overwhelmed by the response from other surfers after posting his experience online.

“Lots of people reached out – so many people have said they’re had exactly the same symptoms,” Rowland said.

Marine scientists took water samples from the foam, which is a byproduct of the toxic organisms' decay, on Monday, but it could take until the end of the week to identify the organism, Gaylard said.

A bloom of microalgae – microscopic, single-celled organisms – could have been caused by a recent extended period of hot and dry weather with little wind and low tides, Gaylard said.

A swell has picked up in the area since Sunday, and the turbulence could break up the algae while generating more foam, he said.

“At the moment, we’re not sure how long this will last,” Gaylard said.