(Fe,Mn)WO₄

This sample of Wolframite is displayed in the Smithsonian Museum of Natural History. Wolframite is an oxide mineral of tungsten with iron and manganese. Its composition is (Fe,Mn)WO₄. The sample at left is about 20 cm wide and is from North Chungchon, South Korea.

The Wolframite sample at right is about 20 x 28 cm and is from Chicote mine, Quime, Bolivia.

This Wolframite sample is about 4 x 6 cm and is from Pacuni Chico mine, Cochabamba, Bolivia.