Osmium is a very heavy metal due to its large atomic mass. It is known to produce an unpleasant smell and is highly toxic when in compounds. Its name is drawn from the Greek word Osme meaning smell. Whilst Osmium does not have many uses its oxide, Osmium Tetroxide is used to stain fatty acid tissues for microscopes and in fingerprint detection. It is also used in electrical equipment as an alloy. It is not a natural element in the earth’s crust instead existing in ores Iridomine usually found in the Americas of Ural mountains. It is a solid metal at room temperature with a melting point of 3327°c and a boiling point of 5300°c.