Rare specimen showing a calcite crystal-group covered by a thin layer of fine crystalline quartz. Specimen is from a unique occurrence near Fontainebleau, France. Actual height of sample is 110 mm.

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Photo credit: © DIRK WIERSMA/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, calcite, covered, crystal, crystalline, crystals, earth, encrusted, fine, geological, geology, mineral, mineralogy, minerals, quartz, rock, sciences, silica