fossil

Fossil-bearing limestone with a disc-shaped fossil

Calcareous sedimentary rock containing an unidentified fossil; precise fossil identification is not possible from the image

AI-generated identification · may be incorrect

Buff-tan, fine-grained rock with a darker circular fossil or fossil cross-section. Likely calcite-rich; hardness and internal structure cannot be determined reliably from the photo.

Identified October 16, 2026More fossil →

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At a glance

Common name: Fossil-bearing limestone with a disc-shaped fossil
Scientific name: Calcareous sedimentary rock containing an unidentified fossil; precise fossil identification is not possible from the image
Category: fossil
Identified: October 16, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small, unidentified specimen; identifiable, well-preserved fossils can be worth more.

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

Buff-tan, fine-grained rock with a darker circular fossil or fossil cross-section. Likely calcite-rich; hardness and internal structure cannot be determined reliably from the photo.

Formation & geological history

Limestone forms from carbonate sediment, often in marine settings; the fossil was buried and preserved as the sediment lithified. Its geological age cannot be determined from appearance alone.

Uses & applications

Primarily collected and studied for its fossil; fossiliferous limestone is also used as building stone and for cement or lime.

Geological facts

The central ring-like pattern may be a fossil cross-section, but its identity requires closer examination and geological context.

Field identification & locations

Look for repeated biological symmetry, shell-like layers, or distinct fossil boundaries; avoid acid or scratching tests on a collectible. Fossil-bearing limestone occurs worldwide, especially in ancient marine strata.