Here's a bit more about its appearance:

* Shiny: It has a metallic luster, meaning it reflects light well and appears shiny.

* Hard and brittle: Cobalt is a relatively hard metal, but it is also brittle, meaning it can break easily.

* Magnetic: Pure cobalt is ferromagnetic, meaning it is strongly attracted to magnets.

Keep in mind that the appearance of cobalt can vary depending on its form and how it's been processed. For example, powdered cobalt may appear darker than a solid piece.