Rio Tuba mine

The Rio Tuba mine is a large mine in the west of the Philippines in 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. The 60.2 million tonnes of ore contains 764,000 tonnes (752,000 long tons; 842,000 short tons) tonnes of nickel metal. Production started in 1975.