Russian diamond mining giant ALROSA has announced the recovery of a 207.29-carat rough diamond from the Zarnitsa pipe at Udachny Mining and Processing Division in the Russian Republic of Yakutia. The gem-quality rough diamond measures 38.0 х 37.0 х 18.0 mm and is the largest diamond discovered in the history of Zarnitsa. The extracted stone represents a transparent transitional crystal form with a slightly grooved surface. The diamond has no name so far. “The modern mining and processing technologies ensure high degree of diamond preservation,” noted Gleb Shmarov, Chief Geologist of Udachny Mining and Processing Division. Open-pit mining at Zarnitsa started in 1999. Identified reserves of the deposit as of 01.01.2015 amounted to 7.49 million carats. In Q1 this year, as part of increase in the open-pit mine capacity, diamond output exceeded 2.3 times the volume of diamonds extracted during the same period in 2015.