Rubonium
The rubonium ressource can be gathered by placing a rubonium extractory on it. There are two possible rubonium sources with only a different generating rubonium amount. Rubonium can be spent for buildings, modules, upgrades, ... and the remaining gathered rubonium is converted to skillpoints if you win a map by value factor.
So it´s important to not waste it for unnecessary objects to get as many skillpoints as possible after the map.