Cobalt Metal. Quantity is 7.1 grams total The metal is in pellet form. Each pellet measures 1/4" diameter x 1/4" length. Weight is 1.79 grams per pellet. Buyer will recieve 4 pellets with a total weight of 7.1 grams. Cobalt is Atomic Element No. 27 on the periodic table of elements. Cobalt is a hard ferromagnetic silver-white element. It is frequently associated with nickel, and both are characteristic ingredients of meteoric iron. Cobalt in small amounts is essential to many living organisms, including humans. Having 0.13 to 0.30 ppm of cobalt in soils markedly improves the health of grazing animals. Cobalt is a central component of the vitamin cobalamin, or vitamin B-12. Cobalt-60, an artificially produced radioactive isotope of cobalt, is an important radioactive tracer and cancer-treatment agent. Cobalt pigments such as cobalt blue and cobalt green have been used for centuries in glass making. And Cobalt's ferromagnetic properties lend themselves to powerful permanent magnets such as Samarium-Cobalt or SamCo magnets, a powerful rare earth magnet first produced in 1970.