Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Seleniodigenite : Cu7.05 S2.56 Se1.44
Se up to 18%, Se/S+Se up to 0.36
Deep parts of the superficial oxidation zone : metasomatic lenses of digenite, associated with malachite, chalcomenite, kasolite, cuprosklodowskite, wulfenite, etc.
Secondary S-Se concentration, or primary sulfide mineralization associated with uraninite.
Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo