So, someone made the suggestion of astronomy and stars, which give me an idea.
Jorbar can implement meteor showers which spawns stone boulders on the hafenland, this can solve the problem that people complain there is no stone in some area.
Also, there can be some chance for ore boulders to be spawned by meteor showers, even ores that contain gold! the chance shouldn't be too great, people should still mainly use mining, but the chance should be big enough to give one some happy surprises every now and then.
Considering that we are talking about meteorites that came from the sky, some of them should be high quality stones or ores.
Then, maybe make it that people with the astronomy skill, can use some tools, telescope or whatnot, and depending on their intelligence and perception, can detect the location of the star spawned boulders in a larger area than what rustroot does, since otherwise, it'd be useless because custom clients have radar for boulders.
Or maybe make these special boulders work like foragebles, only people with enough intel*perc with astronomy skill can see them.