fossil

Fossiliferous limestone, possibly a weathered shell or bone fragment

Calcite (CaCO₃) fossil material in limestone; exact fossil identification is uncertain from the image

AI-generated identification · may be incorrect

Brown to tan, dull-to-earthy luster, irregular layered/porous texture, and apparent fossil structure. Calcite has Mohs hardness 3, rhombohedral cleavage, and specific gravity about 2.7; it should fizz with dilute hydrochloric acid or vinegar, especially on a fresh surface.

Identified September 6, 2026More fossil →

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At a glance

Common name: Fossiliferous limestone, possibly a weathered shell or bone fragment
Scientific name: Calcite (CaCO₃) fossil material in limestone; exact fossil identification is uncertain from the image
Category: fossil
Identified: September 6, 2026
Method: Standard

AI Estimated Value

About $5–$30 as an unattributed specimen; $30–$150+ if professionally identified, well preserved, and from a documented locality.

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

Likely marine carbonate sediment deposited during the Paleozoic or Mesozoic and later lithified, with fossil material preserved and exposed by weathering. The specimen may also be a mineralized shell or bone rather than a whole rock.

Uses & applications

Primarily a fossil or geological collectible; limestone is widely used for cement, aggregate, lime, and building stone, while attractive fossil pieces may be displayed.

Geological facts

The visible ridges and porous patterns resemble biological structure, but lighting and erosion prevent reliable species-level identification.

Field identification & locations

Look for repeating biological symmetry, internal chambers, shell growth lines, or bone-like pores; test cautiously for calcite reaction and avoid destructive cleaning. Common sources include marine limestone beds worldwide.