Many were forced to work in gold or silver mines, one of which was a mountain with rich silver ore, located in Potosí, Bolivia.
Daudzus no viņiem piespieda strādāt zelta un sudraba raktuvēs; vienas no raktuvēm atradās kādā kalnā Potosi (Bolīvijā), kur bija atklātas ārkārtīgi bagātas sudraba atradnes.