Moscow: ALROSA reported it has produced a 83.5-carat diamond at its Jubilee kimberlite pipe. The diamond crystal has a yellowish semi-transparent tint, its dimensions are 24 х 15 х 17 mm. The stone has inclusions of sulfides, olivines with tensor cracks and pyrope in the intermediate and central zone.
The Jubilee pipe has been developed as an open pit since 1989, and accounts for the bulk of ore that Aikhal plant processes. In accordance with JORC, Jubilee reserves are estimated at 95 million carats of rough diamonds. Based on this assessment, mining at the pipe can be provided until 2035.
Aikhal Mining and Processing Plant is a producer of diamonds from the Jubilee, Komsomolsky and Aikhal deposits. In 2016, the Aikhal plant produced 12.2 million carats of diamonds worth $1.2 billion.