Logs can be obtained at the Sawmill (available at level 13), coal and ore can be mined in  the Mine (available at level 21), stones can be found in the Quarry (available at level 31), and gems can be found at the Gold Mine (available at level 42) .Restore the building and start producing goods. Please note that these buildings do not have a manufacturing queue. They do, however, produce items very quickly.