Species: Uraninite var. Pitchblende
Locality: Schwartzwalder Mine, Ralston Buttes Mining District, Jefferson County, Colorado, USA
Dimensions: 3.4 x 3.1 x 1.9 cm.
Ex. Hal Miller Collection
Totally solid, heavy specimen of waxy black Uraninite from the Schwartzwalder Mine, Ralston Buttes Mining District, Jefferson County, Colorado, USA. Specimens like this are exceptionally rare for this locality. Measures ~150,000 CPM on my Ludlum Model 3 Counter with the 44-9 probe. Rare!!