Cobalt, Cobalt-60, Crystal structure, Isotopes of cobalt, Samarium-cobalt magnet, Cobalt blue, Cobaltite, Cobalt(II) sulfate, Cerulean, Cobalt(II) bromide, Cobalt(II) chloride, Cobalt(II) hydroxide, Cobalt(II,III) oxide, Cobalt(III) fluoride, Cobaltocene, Dicobalt edetate, Dicobalt octacarbonyl, Hexamminecobalt(III) chloride, Hydroxocobalamin, Salcomine, Cobalt poisoning, Tris(ethylenediamine)cobalt(III) chloride, Radionuclide, Cancer