The planet I'm currently on is massive, like enormous, and has rare deposites of Chrysolite crystals, the only planet aside from my starter planet that I've found them on. In addition the caves are FILLED with vortex cubes. The problem? None of the outposts have trading terminals to sell them at, otherwise there's massive networks of these caves everywhere.
When I do find a "crashed" trade terminal that lets me sell, I pillage every cave nearby for every vortex cube and make a few million.
Once I'm done doing all of that, I may raid the surface, as there's giant hills like the one in your picture of GOLD everywhere.
This planet is literally a gold mine.
Did I mention it is absolutely massive?
I will touch down in an area and find one of those orange beam towers that lets you locate your choice of signals nearby. I'll look for drop pods and abandoned buildings (for ship wreckage signals) and then once I'm done with that area I'll pulse drive into space, look down, and the area which I was just at, which was quite an extensive area of running around for about an hour, is like looking at something the size of Hawaii on earth.