fossil

Fossiliferous limestone with a possible plant or shell impression

Calcite-rich limestone (mainly CaCO₃); fossil identity is indeterminate from the image

AI-generated identification · may be incorrect

Pale gray, fine-grained, matte specimen with a darker elongated imprint; likely Mohs hardness 3 and calcite’s trigonal crystal structure, though the surface appears cut or prepared.

Identified October 9, 2026More fossil →

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At a glance

Common name: Fossiliferous limestone with a possible plant or shell impression
Scientific name: Calcite-rich limestone (mainly CaCO₃); fossil identity is indeterminate from the image
Category: fossil
Identified: October 9, 2026
Method: Standard

AI Estimated Value

About $5–$30 if an ordinary prepared specimen; value depends on confirmed fossil identity, detail, and provenance.

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

Pale gray, fine-grained, matte specimen with a darker elongated imprint; likely Mohs hardness 3 and calcite’s trigonal crystal structure, though the surface appears cut or prepared.

Formation & geological history

Limestone forms from marine carbonate mud or skeletal debris and may preserve fossils as sediments lithify. The specimen’s age and exact depositional environment cannot be established from the photograph.

Uses & applications

Fossils in limestone are collected and studied for clues to ancient life and environments; limestone is also used in cement, aggregate, and building stone.

Geological facts

The dark feature could be a fossil, mineral staining, or an inclusion; a photo alone cannot confirm which.

Field identification & locations

Look for repeated biological structure, shell symmetry, or a distinct boundary between fossil and matrix; dilute acid effervescence can indicate calcite, but may damage a specimen. Limestone occurs widely in sedimentary basins worldwide.