BlueRock Diamonds PLC (LON:BRD) has sold a 20.72-carat gem-quality diamond for US$236,000 in its October tender.
In an update on Monday, the miner said this is the highest amount it has ever received for a single stone, outshining its previous record for the sale of a 24.8 carat stone for US$190,000 in June.
READ: BlueRock Diamonds hails record production
The owner and operator of the Kareevlei diamond mine in the Kimberley region of South Africa has sold at least seven diamonds this year at a price higher than US$50,000, and will announce its full sales for the fourth quarter in a production update in January.
Executive chairman Mike Houston said: "I am pleased with the recovery and sale of yet another high-value diamond which continues to underpin the increasing potential of the Kareevlei mine."