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Obsidian
unknown1780/1790
Civic Museums of Reggio Emilia
Reggio Emilia, Italy
Sectioned obsidian sample. The smooth surfaces show an alternation of black levels of obsidian and clear levels of minute bubbles, which have formed during the sliding process, and were subsequently deformed from an originally spherical to an elliptical shape.
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Details
- Title: Obsidian
- Creator: unknown
- Date: 1780/1790
- Location: Musei Civici di Reggio Emilia
- Period: Second half of XVIII century
- Bibliography: Jona A., "La collezione monumentale di Lazzaro Spallanzani classificata e ordinata secondo lo stato della scienza alla fine del secolo XVIII", catalogo guida, Reggio Emilia, 1888
- Type: Lithological sample
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