Lucapa has recovered a 404.2 carat diamond.
The Type IIa D-colour gem was found at its Mining Block 8 alluvial project at the Lulo mine, and is more than double the weight of the previously largest stone which weighed 133.4 carats.
According to the miner, this is the largest recorded diamond ever found in Angola and the largest ever discovered by an Australian company.
The former largest stone found in Angola – known as the Angolan Star – weighed 217.4 carats.
It went on to add that is ranks as the 27th largest single diamond ever found.
Mining Block 8, where the stone was recovered, has already produced more than 60 large special diamonds since operations commenced in August last year.
Lucapa CEO Stephen Wetherall welcomed the find.
“We have always emphasised the very special nature of the Lulo diamond field and this recovery – together with the 100 carat-plus diamonds recovered this year alone – is further evidence of that,” Wetherall said.
“And while we continue mining these exceptional alluvial gems from Mining Block 6 and 8 at Lulo, we are also continuing to advance our systematic exploration program to find the kimberlite source of these diamonds.’