Russian mining giant Alrosa said production in the third quarter of this year was 9.9 million carats, a rise of 9 percent from the prior year period.
And in the first three quarters of this year, production climbed 6 percent on the year to 27.1 million carats.
"The increase in production was due primarily to the acquisition of the diamond mining company Nizhne-Lenskoye, an increase in ore grade at the Jubilee pipe and a higher output from the Mir underground mine," the mining firm said.
Alrosa is the largest diamond producer in the world in terms of volume and the second-biggest by value.
Last year, it produced 34.4 million carats of rough diamonds.
