Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal cobalt Oxlate cobalt sulphate Cobalt Chloride Cobalt Carbonate Cobalt Powder cobalt chevrolet cobalt hydroxide cobalt oxide cobalt ore cobalt nitrate cobalt wire cobalt bar cobalt blue cobalt fertilizer cobalt carbonate Origins: China,Canada,Russia,Australia,Zambia,Cuba,Philippines