Diamond Giant Alrosa Unearths 136.24-carat Rock

Russia’s Alrosa (MCX:ALRS), the world's top diamond producer by output in carats, has recovered a 136.24-carat rough diamond from its Nyurbinskaya pipe, a known source of big rocks.

The gem-quality rough diamond, which is 3 Black Makeable 1 colour, measures 29.32 х 23.88 х 21.9 mm and is one of the largest through the history of Nyurbinskaya pipe, the company said.

Currently unnamed, the stone is a combination-form translucent colourless part of a crystal with columnar interlocking sculpture and it contains graphite and sulphide composition.

The Nyurba Mining and Processing Division, one of Alrosa’s youngest units, runs the Nyurbinskaya open-pit mine, in operations since 2001. Last year, Nyurbinskaya accounted for 13% of Alrosa’s total rough diamond production.

Last month, Russia’s government completed the sale of a 10.9% stake in the diamond miner. It was the biggest divestment of a state asset since the government reduced its stake in the diamond producer almost three years ago.