Osmium is a dense, bluish-white metal that belongs to the platinum group of elements. It is known for being one of the heaviest naturally occurring elements, with a density of about 22.59 grams per cubic centimeter. Osmium is primarily used in applications that require durability and hardness, such as in fountain pen nibs, electrical contacts, and as a catalyst in chemical reactions. This metal is not commonly found in its pure form in nature; instead, it is usually extracted from ores containing platinum and other related metals. Due to its rarity and high density, osmium is often alloyed with other metals to enhance their properties, making it valuable in various industrial applications.