Nodule of pyrite partially transformed into goethite, an iro - Lot 133

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Lot n° 133
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60 - 100 EUR
Nodule of pyrite partially transformed into goethite, an iro - Lot 133
Nodule of pyrite partially transformed into goethite, an iron hydroxide. Most often mistaken for marcasites, these fibro-radiated balls bristling with pyrite crystals are found in certain levels of chalk in Normandy and Champagne. Local custom calls them "thunder stones". 6.5 cm
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