Pseudomorphose von Quarz nach Calcit (Fundort Fontainebleau bei Paris/Frankreich), ca. 40 cm breit. Das Objekt wurde 1816 von Dr. Donner aus Berlin nach Jena an die "Societät für die gesammte Mineralogie zu Jena" geschenkt. SI O 2 33 x 28 x 18
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