sedimentary

Light-colored limestone (probable fossiliferous or micritic limestone)

Calcite-rich carbonate rock; predominantly CaCO₃ (calcite)

AI-generated identification · may be incorrect

Typically white to gray, dull to subtly crystalline, with Mohs hardness 3 and good reaction to dilute hydrochloric acid or vinegar. The specimen appears fine-grained and porous, possibly containing small fossil or weathering cavities; cleavage is not apparent in the rock mass.

Identified August 11, 2026More sedimentary →

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At a glance

Common name: Light-colored limestone (probable fossiliferous or micritic limestone)
Scientific name: Calcite-rich carbonate rock; predominantly CaCO₃ (calcite)
Category: sedimentary
Identified: August 11, 2026
Method: Standard

AI Estimated Value

Common rough limestone: approximately $1–$20 per small specimen; attractive fossiliferous or sculptural pieces may bring $20–$100.

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 accumulated carbonate mud, shell material, or biochemical sediments that lithified in a shallow marine environment. Its exact geological age cannot be determined from the image; limestone ranges from Precambrian to Recent.

Uses & applications

Used extensively for crushed stone, cement, lime, aggregate, building stone, and dimension stone; attractive varieties are used for architectural surfaces and carving.

Geological facts

Calcite-rich limestone effervesces vigorously in dilute acid, distinguishing it from many silicate rocks. Weathering commonly produces pits, cavities, and softened surfaces.

Field identification & locations

Common in sedimentary terrains worldwide, including the Mediterranean, Alps, Appalachians, and many coastal basins. Confirm with an acid test, relatively low hardness, and powdery white streak; the image may show limestone embedded in masonry or exposed bedrock.