sedimentary

Weathered limestone or dolostone

Micritic limestone, primarily calcite (CaCO₃), possibly dolomite (CaMg(CO₃)₂)

AI-generated identification · may be incorrect

Beige, fine-grained, dull to earthy, with dark weathering spots and irregular fractures; likely Mohs hardness 3 (limestone) or 3.5–4 (dolostone), nonmetallic, and lacking visible crystals. It should fizz readily with dilute hydrochloric acid if calcitic; dolostone fizzes weakly when powdered.

Identified August 24, 2026More sedimentary →

Explore Weathered limestone or dolostone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Weathered limestone or dolostone
Scientific name: Micritic limestone, primarily calcite (CaCO₃), possibly dolomite (CaMg(CO₃)₂)
Category: sedimentary
Identified: August 24, 2026
Method: Standard

AI Estimated Value

$0–$10 for an ordinary weathered specimen; approximately $10–$30 if fossiliferous, unusually shaped, or demonstrably from a notable 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

Formed from compacted carbonate mud or skeletal debris in ancient shallow marine environments, commonly ranging from Paleozoic to Cenozoic age; the specimen is strongly weathered and possibly naturally water-worn.

Uses & applications

Used extensively for aggregate, cement, lime, building stone, and soil treatment; ordinary pieces have little jewelry or collector value.

Geological facts

Dark spots may be iron/manganese oxides, fossil fragments, or weathering cavities; the photograph does not show diagnostic fossils or crystal faces.

Field identification & locations

Common worldwide, especially in former seafloors and karst regions. Confirm by acid reaction, streak (white), and testing hardness against a copper coin or steel nail; avoid acid if preservation matters.