Franklinite is a mineral primarily composed of zinc, iron, and manganese oxides. It is typically found in metamorphic rocks and is known for its black color and metallic luster. This mineral is often associated with other minerals such as zincite and willemite, which are also found in the same deposits. Discovered in the 19th century, Franklinite is named after the Franklin Mining District in New Jersey, where it was first identified. It is an important source of zinc and is used in various industrial applications, including the production of alloys and batteries.