The diamond producer is also looking to adjust its supply chains, as Western customers want assurance that their purchases do not come from Russia.

Politburo reiterated its support for a lockdown-dependent approach to contain the virus.

The dollar index slipped after hitting a 20-year high, making gold less expensive for overseas buyers.

The Fed on Wednesday raised its benchmark overnight interest rate by half a percentage point, the biggest jump in 22 years.

The 228.31 carat pear-shaped stone roughly the size of a golf ball is expected to sell for up to $30 million.

Gold's reversal comes amid another rally in the dollar index.

The world’s biggest mining company sees nickel as one of three “future-facing commodities” -- along with copper and potash.