Luxury resources are harvested by the luxury module, which is included on the default mining starbase but at a low rate. There is plenty of room for improvement so I made a deluxe mining station by adding a few miner and luxury modules in addition to defensive weaponry. The design screen will state the productions numbers.
Interesting I hadn't thought about looking at the designs of resource gathering structures. Sounds obvious now that you mention it, thanks.
Mindset, Tactics, Skill, Equipment
Diligentia, Vis, Celeritas