Polished chromium reflects almost 70% of the visible spectrum, and almost 90% of infrared light. Chromium is also highly valued as a metal that is able to be highly polished while resisting tarnishing. Chromium is the main additive in stainless steel, to which it adds anti-corrosive properties. It is a steely-grey, lustrous, hard, and brittle transition metal. Chromium is a chemical element with the symbol Cr and atomic number 24.
