sedimentary

Weathered fossil-bearing limestone pebble

Micritic limestone, chiefly calcium carbonate (calcite, CaCO₃), possibly containing a fossil cavity or internal mold

AI-generated identification · may be incorrect

Usually Mohs hardness 3, pale cream to yellow, dull to earthy luster, fine-grained crystalline calcite, and poor or indistinct cleavage. The visible dark depression may be a fossil mold, vug, or weathered cavity; dilute hydrochloric acid should fizz strongly.

Identified August 30, 2026More sedimentary →

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At a glance

Common name: Weathered fossil-bearing limestone pebble
Scientific name: Micritic limestone, chiefly calcium carbonate (calcite, CaCO₃), possibly containing a fossil cavity or internal mold
Category: sedimentary
Identified: August 30, 2026
Method: Standard

AI Estimated Value

$2–$15 as an ordinary pebble; approximately $15–$50 if a recognizable, documented fossil is confirmed.

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 from compacted carbonate mud or shell material in a marine environment, commonly during the Paleozoic–Cenozoic eras, then rounded and weathered as a pebble. Exact age and fossil identity cannot be determined from the photograph.

Uses & applications

Used as aggregate, cement and lime feedstock, building stone, and ornamental material; fossiliferous pieces are mainly collectibles. This small specimen has modest commercial value.

Geological facts

The cavity may represent a dissolved shell, burrow, or fossil cast, but the image is insufficient for confident identification. Limestone commonly develops solution pits because calcite dissolves in weakly acidic water.

Field identification & locations

Common in marine sedimentary regions worldwide, including parts of Europe, North America, and the Middle East. Test an inconspicuous spot with vinegar or dilute acid, inspect for shell textures, and compare the cavity with known fossil forms.