Dickthomssenite

Dickthomssenite is a rare mineral that occurs only in Utah in the United States at its type locality in the Firefly-Pigmay mine, as well as in the Vanadium Queen and Blue Cap mines. Dickthomssenite occurs in  oxidized uranium-vanadium deposits in association with pascoite, sherwoodite, and selenium. Ex Billie Gotherman

Locality: Blue Cap Mine, San Juan County, Utah

Composition: hydrated magnesium vanadate