sedimentary

Pale limestone or calcite-rich rock

Calcite (CaCO₃), likely micritic limestone

AI-generated identification · may be incorrect

Cream to pale pink, dull-to-waxy luster, fine-grained and massive with no visible crystals; calcite hardness is Mohs 3, and it should effervesce strongly in dilute hydrochloric acid or vinegar (if fresh). Specific gravity is typically about 2.3–2.7.

Identified September 3, 2026More sedimentary →

Explore Pale limestone or calcite-rich rock 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

Likely formed as compacted carbonate mud or biogenic sediment that lithified into limestone; the image cannot establish its geological age, which may range from Paleozoic to recent deposits.

Uses & applications

Used extensively for cement, aggregate, dimension stone, soil treatment, and lime production; attractive polished pieces may be used decoratively but this specimen appears ordinary.

Geological facts

The rounded form and pale color could also represent a weathered calcite-rich fragment, chalky limestone, or a tumbled piece; visual identification alone cannot distinguish these confidently.

Field identification & locations

Common in marine sedimentary terrains, caves, and limestone quarries worldwide. Confirm with an acid test, relatively low hardness, and a white streak; it should not scratch glass.