The Russian region of Kolyma is famous for its rich gold and tin fields. Cassiterite started to be extracted here back in the 1930s when it was realized it made no sense to bring it from England when
they could get it in the Magadan region. The mine named after Sergey Lazo and the Factory of Chapaev were both opened in 1940. They had big plans which were not fated to be executed.