Check the listing for details. Fossilized Indiana Not Mazon Creek Ironstone Mudstone Concretion 2,668 Grams. Condition: New. Listed at 75.00 USD. This product is a unique and heavy fossilized concretion weighing 2,668 grams, likely from Indiana. It is not from the Mazon Creek Ironstone Mudstone, adding to its rarity and appeal for collectors of fossils.
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