Description
Species: Montroseite, Tyuyamunite
Locality: Monument #2 mine, Monument Valley, Navajo County, Arizona
Size: 6.3 x 2.8 x 5.9 cm (156 Grams)
Ex. Jack Nieburger Collection
Nice rich specimen of these rare uranium-vanadium species from a classic Four Corners locality. Measures ~50,000 CPM on my Ludlum Model 3 Counter with the 44-9 probe. Rare!