fossil

Fossilized bone fragment (probable vertebrate bone)

Permineralized bone; exact taxon indeterminate from the image

AI-generated identification · may be incorrect

Cream to yellow-brown, porous and weathered, with layered cortical/trabecular texture and possible vascular channels; hardness commonly about 4–6 Mohs after mineralization, with dull to slightly waxy luster. Composition is typically apatite [Ca5(PO4)3(F,OH,Cl)] replacing or filling original bone.

Identified September 13, 2026More fossil →

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Physical properties

Formation & geological history

Formed when buried bone was permineralized by groundwater, commonly during the Mesozoic or Cenozoic; the specimen’s age cannot be determined visually. Sedimentary-hosted fossilization is most likely.

Uses & applications

Primarily a paleontological and educational collectible; scientifically important specimens may be prepared for museum display, while ordinary fragments have little practical industrial use.

Geological facts

The apparent internal channels and compact outer cortex are consistent with bone rather than ordinary limestone, though identification requires magnification and possibly thin-section or chemical testing.

Field identification & locations

Common in sedimentary exposures, river gravels, deserts, and fossil beds worldwide; inspect for cellular pores, curved anatomy, and mineral-filled cavities. Avoid acid or aggressive cleaning.