Langbanite on Calcite

Langbanite is considered a very rare mineral with the Langban Mine being the type locality. The mine operated from 1711 to 1972 and has been considered one of the most mineral rich deposits in the world, with over 300 species identified. Ex Terrence Thompson, who purchased it in 1996.

Locality: Langban Mine, Varmland, Grythytte Parrish, Sweden

Composition: manganese, calcium, iron, antimony silicate