Pintadoite
Fawn Springs No. 9, Uravan Mining District, Montrose County, Colorado, USA
Bright green pintadoite from the tailings pile of the Fawn Springs No. 9 Mine in Bull Canyon. The associated yellow mineral, although resembling carnotite or tyuyamunite, is not radioactive, and is apparently another efflorescent vanadate, possibly steigerite. The darker greenish black mineral may be fernandinite. Specimens with complex, ...
© Dan Polhemus 2020