The 242-carat diamond is one of the largest gem-quality ones mined by the Russian company since 2000.

The Scottish miner also said that slower than anticipated labour build-up and training will impact March production.

The figure pales in comparison to the $1 trillion in coal investments held by almost 4,500 institutions globally as of January this year.

The miner beat expectations with a small fall in 2020 earnings, but boosted dividend as soaring commodity prices helped it recover from covid-19 disruptions in the first half of the year.