What is referred to by 'cobalt powder'?

Based on the clue 'coastal name for the mediterranean pirates of alge...', what is the answer? Based on the clue 'coastal waters beyond national jurisdiction or the...', what is the answer? Based on the clue 'cobalamine or pyridoxine or riboflavin', what is the answer? What is referred to by 'cobalt plane'? What is referred to by 'cobb chefs waldorf'? What is referred to by 'cobb peach oglethorpe'? Based on the clue 'cobb place chrysler freeway lansing avenue', what is the answer? What is referred to by 'cobb saito ariadne'?