Gold deposits at the Podgolechnoye mine in Yakutia are more impressive than earlier understood.
As temperatures sunk to minus 50C and below, schools and kindergartens were closed for the world's hardiest children.
The Siberian producer - owned mainly by the Russian state and the Sakha government - hopes to shine on the international market.
Svetlana Churkina, 28, from the Sakha Republic (Yakutia) had gone through eight surgical operations after the crash.
President Yegor Borisov in high level meetings in United Arab Emirates.
The unique scientific vault will safely store ancient remains at temperatures as low as minus 24C.
A deal worth at least $60 million a year is close between Russia's largest diamond mining company and the US giant Tiffany & Co.
Alexander Smelov, 55, killed in his office in Yakutsk.