Rusolovo completed work on core drilling at the Pyrkakayskie Shtokverki tin deposit in the amount of 5 thousand linear meters. Now the core material has been sent for sample preparation. Then samples for analytical studies will be sent to the research laboratory in Chita. Pyrkakai stockworks is one of the world's largest tin deposits with reserves of 243 thousand tons of tin and 16 thousand tons of tungsten trioxide.