WGNHS
Wisconsin Geological and Natural History Survey

Minium

Minium with pen for scale. From the mineral collection of Brigham Young University Department of Geology, Provo, Utah, Mineral Specimens 779. Courtesy of the U.S. Geological Survey Denver Library Photographic Collection. (Photo by Andrew Silver.)

Formula: Pb3O4 Tetragonal

Description:

Minium is a rare mineral found as red dull to greasy masses in the oxidized zone of lead deposits where it forms as the result of the alteration of galena.

IOWA COUNTY: Minium is reported as masses encrusting galena in the lead deposits near Mineral Point (Palache, Berman and Frondel, 1944).