Russian mining giant Alrosa has found a 102.85-carat diamond which it says has a moderate yellowish hue.
The stone was unearthed at the Jubilee kimberlite pipe and is believed to be worth more than $480,000.
The octahedral-shaped diamond was found by the Aikhal Mining and Processing Division last month.
Two years ago, the Aikhal Mining and Concentration Mill unearthed a 253.16-carat rough diamond with an estimated value of $1.5 million to $2 million at the Jubilee pipe.
At the time Alrosa said technological progress at its production facility was the reason for its success in recovering large stones and preventing breakages.