Smaltite is a rare mineral that is classified as a sulfide of the element cobalt. This mineral is known to have a metallic luster and can be found in various shades of silver-gray. Some of the synonyms for smaltite include cobaltite, cobaltpentlandite, and cobalt nickelite. These minerals share similar properties with smaltite, including a high content of cobalt and nickel. Smaltite has various uses in industry, including the production of batteries, magnetic materials, and other electronic components. Although it is rare, smaltite is considered an essential mineral due to its unique properties and versatility.