The value of metallic minerals in 2009-10 at `32274.29 crore decreased by about 10.52% over the previous year. Among the principal metallic minerals, iron ore contributed `26864.84 crore or 83.24%, zinc concentrate `1290.85 crore or 4.0%, manganese ore `1269.54 crore or 3.93%, chromite `1183.41 crore or 3.67%, bauxite `456.36 crore or 1.41%, copper (concentrate) `362.54 crore or 1.12%, silver `338.84 crore or 1.05% and gold `331.39 crore or 1.03%, while the remaining was shared by Lead Concentrates and Tin Concentrates.