cobalt is a chemical present in the enameled mineral which is used as a pigment for the blue tint in the entire

metallic cobaltocalcite gemstone calcite chalcopyrite cobalt bloom geological vibrant mining semiprecious azurite sample object mineralogy gem macro color metal blue background isolated rock mineral stone geology nature ore natural nugget pyrite white coas chemical element present enameled coas2 used pigment tint entire industry worldwide