Manganese Specimen 7.2g 2cm

Small Manganese crystal specimen. Size approx 2cm. Weight approx 7.2g.

Manganese is a native metal. It is hard, brittle and metallic silver. Manganese is often found in minerals in combination with iron. Metallic manganese was first isolated in 1774 by a Swedish mineralogist. A relatively abundant metal, Manganese is widely distributed throughout Earth’s crust. In addition to terrestrial sources, manganese is present in nodules that are distributed widely over the seafloor. Higher-grade nodules contain 10 to 20 percent manganese along with significant amounts of cobalt, copper, and nickel.