imayini yinkqubo yokuthatha izinto ngaphantsi emhlabeni. Nayiphi na into enganakukhula mayisetyenzwe ngokwasezimayini. Ukusebenza ngezinto zisemathunjini omhlaba kuthiwa kuyembiwa. Ukusebenza ezimayini kungabandakanya ukwembiwa kweemetal kunye neetyuwa zomhlaba, ezinje ngamalahle, idayimani, igolide, isilivere, iplatinum, icopper, kunye neiron. Ukusebenza ngemigodi kungabandakanya nezinye izinto ezifana ne-oli negesi yemveli.