fossil

Fossilized bone or tooth fragment

Indeterminate vertebrate fossil; likely permineralized bone, possibly a large mammal or marine vertebrate

AI-generated identification · may be incorrect

Tan-brown, irregular specimen with layered fibrous texture and possible porous/cancellous areas; luster is dull to slightly waxy. Hardness is commonly about 3–6 Mohs depending on mineralization; density and crystal structure are variable, with no reliable cleavage.

Identified September 12, 2026More fossil →

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At a glance

Common name: Fossilized bone or tooth fragment
Scientific name: Indeterminate vertebrate fossil; likely permineralized bone, possibly a large mammal or marine vertebrate
Category: fossil
Identified: September 12, 2026
Method: Standard

AI Estimated Value

About $5–$50 for an unattributed fragment; $50–$500+ if definitively identified, legally sourced, and scientifically or aesthetically distinctive.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Originally biological tissue buried in sediment and gradually permineralized by silica, calcite, or iron-bearing groundwater. Age cannot be determined from the photograph and may range from relatively recent Quaternary material to much older fossil-bearing strata.

Uses & applications

Primarily valued for collecting, education, and display; polished fossil bone may be used decoratively. Scientific value depends on secure locality data and identification.

Geological facts

The apparent internal striations and irregular porous texture are more consistent with fossil bone or tooth than with an ordinary rock, but the image alone cannot distinguish bone, tooth, or weathered wood.

Field identification & locations

Check for a cellular/vascular pore pattern, unusually high density, and continuity of texture across broken surfaces; a hot-pin test is destructive and not recommended. Common sources include river gravels, deserts, caves, and sedimentary outcrops worldwide.