Geological or archaeological stone rock concretion.
Concretions are hard, compact masses of mineral matter that form inside sedimentary rock, often appearing spherical or disc-shaped. At times, concretions are formed around prehistoric faunal or floral matter, and contain fossils along the interior.
Height: 3 1/4 in x diameter: 3 in.
Condition: Wear commensurate with age and use, including cracks and losses to the stone.
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