Bidspirit auction | Prehistoric Geological Stone Concretion

Prehistoric Geological Stone Concretion - 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.