Rock Identifier
Likely vertebra fossil or bone fragment (Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)) — fossil
fossil

Likely vertebra fossil or bone fragment

Indeterminate fossilized vertebra; mineralized hydroxyapatite, commonly Ca₅(PO₄)₃(OH)

AI-generated identification · may be incorrect

Tan-brown, porous, irregular morphology with a central opening characteristic of a vertebral canal. Original bone has Mohs hardness about 2–3, while fossilized material may reach roughly 3–5; dull to earthy luster and no obvious cleavage.

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Physical properties

Tan-brown, porous, irregular morphology with a central opening characteristic of a vertebral canal. Original bone has Mohs hardness about 2–3, while fossilized material may reach roughly 3–5; dull to earthy luster and no obvious cleavage.

Formation & geological history

This appears to be a biological fossil rather than a rock, likely a weathered vertebra or vertebral fragment. Bone can fossilize through permineralization over thousands to millions of years in sedimentary environments, but its age and species cannot be determined from the image.

Uses & applications

Primarily used for education, natural-history display, and collecting; it has little industrial or jewelry use. Preparation, coating, or artificial aging can affect appearance and value.

Geological facts

The large opening may be the vertebral canal, though a worn animal bone or cast cannot be excluded. Fossil identification generally requires scale, locality, additional views, and inspection of internal structure.

Field identification & locations

Commonly encountered in sedimentary exposures, desert gravels, river deposits, and fossil beds; use a hardness test cautiously because it may damage the specimen. A professional paleontologist or fossil dealer can distinguish genuine fossil bone from modern bone or replica material.

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Bioclastic limestone, composed chiefly of calcite (CaCO₃)

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Weathered fossil bone fragment (identification uncertain)

Fossilized bone; exact taxon and mineral composition cannot be determined from the image

fossil