SPHALERITE

Sphalerite, also known as blende, belongs to the sulfides class. Its chemical formula is (Zn,Fe)S, primarily composed of zinc and sulfur, but can contain traces of iron, magnesium, cadmium, and indium. This mineral showcases a range of colors from brown and black to green and yellow. Its resinous luster and hardness, ranging between 3.5 and 4 on the Mohs scale, make it easily identifiable.

The name "Sphalerite" derives from the Greek term meaning "deceiver", possibly due to its misleading appearance that can be confused with other minerals. Though its exact origin and discoverer aren't clearly documented, Sphalerite has been mined since ancient times across Europe, including Spain, where deposits are found in Cantabria, Basque Country, Navarra, among others.

Chemically speaking, Sphalerite is a rich source of zinc, essential for steel galvanization and brass manufacturing. Moreover, this mineral is a primary source of cadmium, indium, gallium, and germanium, elements used in various industries.