The fifth-largest gem diamond in history sells for $40 million

A 910-carat diamond, named "The Lesotho Legend," was bought by tender Monday by an unnamed buyer in Antwerp, Belgium, according to Gem Diamonds.

Gem Diamonds, which retrieved the rock in January, said it was the fifth-largest gem-quality diamond ever recovered.

The firm said it had removed the diamond from the Letseng mine in Lesotho, a country encircled by South Africa. According to Gem Diamonds in January, it was the largest diamond to have been recovered from the mine.

The company owns 70 percent of the Letseng mine – a location renowned for its production of white diamonds.

Following the sale, Gem Diamonds CEO Clifford Elphick said in a statement that the company was "delighted," adding that its purchase highlighted the "exceptional quality of The Lesotho Legend itself" and the high standard of the Letseng mine's diamond production.

Gem Diamonds has recovered a number of diamonds in recent months, with the company stating last week that it had unearthed six diamonds larger than 100 carats since the start of the year.