Nickel is a transition metal, element 28 with an atomic weight of 58.693. Grade is reported as % elemental nickel. Nickel is priced as USD $/lb for a minimum 99.8% LME required purity. To determine the amount of saleable nickel in a tonne of rock multiply decimal % grade by 2,204.6 (ie 1% nickel grade: 0.01 x 2204.6 = 22.046 lbs of nickel in a tonne of rock). The Nickel Institute is a good resource for information about nickel's sources and uses. Although nickel is overwhelmingly used to make stainless steel, an important emerging use of nickel is in batteries for electric vehicles (see Nickel Institute on Batteries. The United States did not include nickel in its 2018 list of Critical Minerals.