COBALT
-Co- is a hard, lustrous, silver-gray metal with atomic number 27. Cobalt is found naturally only in chemically combined form. Cobalt compounds have been used for centuries to impart a rich blue color to glass, glazes and ceramics.
-Co- is a hard, lustrous, silver-gray metal with atomic number 27. Cobalt is found naturally only in chemically combined form. Cobalt compounds have been used for centuries to impart a rich blue color to glass, glazes and ceramics.