fossil

Fossilized bone fragment (tentative)

Petrified bone; mineral replacement commonly by microcrystalline quartz, calcite, or iron oxides

AI-generated identification · may be incorrect

Tan-brown, fibrous/porous texture with longitudinal striations and a worn, wedge-shaped fragment; luster is dull to slightly waxy. Hardness and density vary with mineralization, typically about Mohs 3–7.

Identified August 22, 2026More fossil →

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At a glance

Common name: Fossilized bone fragment (tentative)
Scientific name: Petrified bone; mineral replacement commonly by microcrystalline quartz, calcite, or iron oxides
Category: fossil
Identified: August 22, 2026
Method: Standard

AI Estimated Value

About $5–$30 for an unverified fragment; $30–$200+ if identified, legally collected, and scientifically or aesthetically exceptional.

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 vertebrate bone preserved in sediment, then partially or completely mineralized during burial; age cannot be determined from the image and may range from recent subfossil to millions of years old.

Uses & applications

Primarily a natural-history collectible and teaching specimen; highly silicified examples may be polished as decorative material, but this fragment has limited practical use.

Geological facts

The apparent grain and irregular porous structure are more consistent with bone than ordinary wood, though image-only identification is uncertain; a microscope, weight, and acid/UV tests would help.

Field identification & locations

Common in sedimentary deposits, deserts, river gravels, and fossil beds worldwide. Look for cellular pores, a compact outer cortex, and bone-like internal structure; avoid destructive testing without expert guidance.