Molybdenite is a mineral composed primarily of molybdenum disulfide (MoS₂). It is typically found in metamorphic and igneous rocks and is recognized for its metallic luster and bluish-gray color. Molybdenite is the primary ore of molybdenum, a metal used in various industrial applications, including steel production and electrical contacts. This mineral often occurs in layered structures, making it easy to split into thin sheets. Molybdenite is not only important for its economic value but also plays a role in the geochemical cycling of sulfur and molybdenum in the environment.