Rio Tuba mine - Wikipedia
The Rio Tuba mine is a large nickel mine run by Nickel Asia Corporation in the west of the Philippines in Bataraza, Palawan. Rio Tuba represents one of the largest nickel reserves in the Philippines having an estimated reserve of 60.2 million tonnes (59,200,000 long tons; 66,400,000 short tons) of ore grading 1.27% nickel. [1]