Cobalt
Cobalt, thorium nitrate
Mixed Nickel / Cobalt Hydroxide
Copper, zinc, nickel, lead (pb) and cobalt
Copper, zinc, nickel, lead(pb) and cobalt, abrasive belt, used mobile phones
Copper, manganese, tin, tantalum, coltan, niobium, cobalt
Cadium ingot, nickel plate, nickel powder, cobalt powder, cobalt sheet, bismuth ingot, potassium hydroxide
Ash, dross, scrap of cobalt, nickel, tin, copper