As a trace element, it is essential to human red blood cell development, in that it is required by Vitamin B12.  
As a trace element, it is essential to human red blood cell development, in that it is required by Vitamin B12.  Isolated in 1753 by Georg Brandt, it has since been detected in Egyptian statuettes and glass at the ruins of Pompeii. Its German name was originally applied to ores thought to carry copper, but which were actually arsenic-bearing ores of this metal, perhaps explaining why its German name refers to goblins that live in mines. Most commonly used in magnetic alloys and its eponymous blue pigment, FTP, identify this chemical element with atomic number 27 and symbol Co.
As a trace element, it is essential to human red blood cell development, in that it is required by Vitamin B12.  
cobalt