sedimentary

White, weathered carbonate rock (possibly limestone)

Likely calcite-rich limestone; exact identification is uncertain from the photograph

AI-generated identification · may be incorrect

Cream-white, dull to slightly waxy, with irregular pits and rounded weathering. If limestone, it is mainly calcite (Mohs 3; trigonal crystals), typically fizzes in dilute acid; texture and hardness cannot be confirmed visually.

Identified October 11, 2026More sedimentary →

Explore White, weathered carbonate rock (possibly limestone) 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

Limestone forms as carbonate sediment or accumulated shells in marine settings, later compacted and cemented; its age cannot be determined from appearance alone.

Uses & applications

Limestone is used for cement and lime, building stone, aggregate, and soil treatment; this small irregular piece appears mainly suitable for collecting or display.

Geological facts

The rough, pitted surface may result from dissolution or weathering, but similar shapes can occur in other carbonate materials.

Field identification & locations

Check for a fizz with a drop of vinegar or dilute acid and test hardness on an inconspicuous spot; common limestones occur in sedimentary basins worldwide. A photo alone cannot rule out a non-geological lookalike.