Expert Ore Miners may be trained in Europe for 600 gold. As with all outdoor workers, there is also a chance that a Free Colonist mining Ore may spontaneously become an Expert Ore Miner. Certain Indian tribes may also teach this skill to visitors. Expert Ore Miners may teach their skill in a Schoolhouse, College or University.
At 600 gold, the Expert Ore Miner is the cheapest trainable unit. After a sufficiently large number of colonists have emigrated due to Crosses, it becomes cheaper to train miners and clear their specialty (converting them to Free Colonists) than to recruit Free Colonists from the docks.