Metal que no se convierte en óxido sino que se mantiene brillante al calentarse en la atmósfera.Metal or alloy that is resistant to oxidation, corrosion, and dissolution by acids. Noble metals remain bright when heated in air. Examples of noble metals are gold, iridium, mercury, osmium, platinum, and ruthenium. In physics, noble metals are restricted to those having filled electronic d-bands: according to this definition in physics, only gold, silver, and copper are noble metals. Many noble metals are also precious metals, due to their rarity in the Earth's crust.Elk van verscheidene metalen of legeringen bestand tegen oxidatie, corrosie en ontbinding door zuren. Voorbeelden van deze definitie van edelmetaal zijn goud, iridium, kwik, osmium, platina en ruthenium.