Nodule of pyrite partially transformed into goethite, an iro - Lot 366

Lot 366
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40 - 60 EUR
Nodule of pyrite partially transformed into goethite, an iro - Lot 366
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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