It would be a weird scene if while running, a large vein of iron suddenly pops out in front of you out of nowhere.
Making the mineral veins slowly crumble and sprout from the ground would be a nice addition to visual fidelity - it would make it seem like the island is aware of adventurers mining every single vein in Aeternum and is constantly using its powers to replenish every mineral mound. Of course, similar to how the fauna spawns, adding the blue flames of azoth as it sprouts would be a nice touch.