fossil

Fossiliferous limestone with possible fossil shells

Bioclastic limestone, chiefly calcite (CaCO₃); apparent fossils are likely shell fragments or fossil molds

AI-generated identification · may be incorrect

Pale tan-gray, dull to slightly earthy surface with rounded, irregular fossil-like patterns; likely Mohs 3, with calcite cleavage and reaction to dilute acid. The visible texture suggests carbonate rock, but the exact fossils cannot be confirmed from the image alone.

Identified October 11, 2026More fossil →

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At a glance

Common name: Fossiliferous limestone with possible fossil shells
Scientific name: Bioclastic limestone, chiefly calcite (CaCO₃); apparent fossils are likely shell fragments or fossil molds
Category: fossil
Identified: October 11, 2026
Method: Standard

AI Estimated Value

About $1–$15 for a small common field specimen; more if fossils are identifiable, well-preserved, or legally collected.

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

Formed as marine organisms and carbonate sediment accumulated on a seafloor, then compacted and cemented; age cannot be determined visually and may range from recent geological periods to hundreds of millions of years.

Uses & applications

Limestone is used for cement, aggregate, and building stone; fossil-rich pieces are mainly collected or displayed.

Geological facts

Fossil outlines may be shells, corals, or internal molds preserved as calcite or sediment infill.

Field identification & locations

Look for repeated shell-like shapes and test an inconspicuous spot with dilute acid for fizzing; common in exposed marine sedimentary formations worldwide. Avoid scratching or acid-testing a collectible specimen.