Alrosa recovers one of the largest diamonds in Russian Federation

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 Alrosa recovers one of the largest diamonds in Russian FederationPJSC ALROSA has recovered one of the largest rough diamonds in the Russian Federation. The rough diamond of 241.21-carats and measuring 38.64 mm by 27.34 mm by 25.46 mm, was recovered from the Nyurbinskaya pipe. It is the third largest among those found at Nyurba Mining and Processing Division.

The diamond is translucent with a grey hue and has traces of dissolution–etching channels and caverns–on the surface. The intermediate and peripheral zones contain large cracks, one of which is ferruginized. The crystal contains graphite and sulphide inclusions. The diamond is 4 Black Clivage/Makeable 2 colour.

Nyurbinsky open-pit mine was put into operation in 2001. Identified reserves of the diamond pipe under JORC as of January 1, 2015, amounted to 36.9 million carats. Nyurba Mining and Processing Division is one of ALROSA’s youngest enterprises. Its share in ALROSA Group’s production totaled 20% in 2015.



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