September, 14 | Jewelry
357-carat diamond: sold for for $19.3 million | Photo: Gem Diamonds

Gem Diamonds has announced the sale of a 357-carat white diamond for $19.3 million.

The diamond was found in the Letseng mine, in Lesotho, and it was sold in a silent auction in Antwerp, Belgium.

"The Letseng mine has produced two remarkable 300-carat plus diamonds during the year to date. The 314 carat diamond, which was recovered in May 2015, and the 357 carat diamond which was sold on tender in September 2015," explains Clifford Elphick, CEO at Gem Diamonds.

"Both of these diamonds achieved top prices despite current market conditions, providing further evidence of the price resilience of Letseng's large top quality diamonds."

Letseng is the world's highest diamond mine. Located at 3,100 meters (10,000 feet), it is owned by Gem Diamonds (70 percent), and the government of Lesotho (30 percent).

Since 2006, the mine delivered four of the twenty largest white gem quality diamonds ever found in Nature.

Jesus Peiro | Porto