sedimentary

Weathered limestone or dolostone

Calcite-rich limestone (CaCO₃), possibly dolomite-bearing

AI-generated identification · may be incorrect

Pale gray-beige, dull to slightly earthy luster, fine-grained and massive, with irregular fractures and weathered surfaces. Typical hardness is Mohs 3 for calcite limestone or 3.5–4 for dolostone; dilute acid fizzes strongly on limestone, weakly or only when powdered on dolostone.

Identified August 28, 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

Physical properties

Formation & geological history

A carbonate sedimentary rock formed from accumulated marine shells, mud, or chemical precipitates, later lithified and uplifted. The image alone cannot establish its geological age; carbonate strata are common across many ages.

Uses & applications

Used as crushed aggregate, road base, cement and lime feedstock, building stone, and occasionally decorative stone. This appears ordinary field material with little collector value.

Geological facts

The blocky shape and pale, fine-grained texture fit weathered carbonate rock better than a crystal-rich igneous rock. No diagnostic fossils or bedding are clearly visible.

Field identification & locations

The reported location near 36.5°N, 4.1°E is geologically compatible with limestone and dolostone in Mediterranean Iberian terrain. Confirm by scratching with a steel nail and applying vinegar or dilute hydrochloric acid; a fresh surface and hand lens may reveal fossils or dolomite texture.