ALROSA Recovers 136-Carat Nubrinskaya Diamond
August 15, 16
(IDEX Online News) – World-leading diamond miner by volume, ALROSA, has announced the recovery of a 136.24-carat diamond from its Nyubrinskaya pipe.
The crystal measures 29.32 mm by 23.88 mm by 21.9 mm, and is gem quality rough diamond, which is 3 Black Makeable 1 Color. The stone is a combination-form translucent colorless part of a crystal with columnar interlocking structure. The stone contains graphite and sulphide composition.
The diamond, which has yet to be named, is one of the largest rough diamonds yet recovered at Nyurba Mining and Processing Division.
The Nyurbinsky open-pit mine was put into operation in 2001 and identified reserves as of January 1, 2015 was 36.9 million carats.