That’s a huge reason I believe, hope, that we will never do that. A more efficient and less catastrophic approach is to do some level of refining out at the source and only send back together refined, pure minerals.
…. Although I realize the irony of advocating for sending, say a rod of pure tungsten, back to earth
And more realistically, I have a hard time believing that will ever be cheaper to bring to earth than to mine locally. While there maybe a handful of elements worth it, more realistically you are mining for use in space



What about those little blue pills?