crystal aggregate consisting of chalcopyrite, galenite, sphalerite, and calcite. Such an assemblage may contain, for example, indium, germanium, and silver. (photo: Jürgen Jeibmann)

Title crystal aggregate consisting of chalcopyrite, galenite, sphalerite, and calcite. Such an assemblage may contain, for example, indium, germanium, and silver. (photo: Jürgen Jeibmann)
Copyright Jürgen Jeibmann
Picture Id 35744
Date 22.02.2012
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