DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Skutterudite, a cobalt arsenide mineral with varying percentages of nickel and iron (Co,Ni,Fe)As. It is an ore for cobalt and nickel. It forms skeletal crystals, as here, as well as cubes or octohedra. From Richelsdorf, Hessen, Germany. Width 60mm.
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