Colorful, well-crystallized specimen of vivid yellow to lime-green Sklodowskite and Cuprosklodowskite from the famous Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo. Measures an impressive ~130,000 CPM on my Ludlum Model 3 Counter with the 44-9 probe. Beautiful under the microscope or loupe. Rare!