sedimentary

Inscribed limestone fragment

Calcitic limestone (primarily CaCO₃), possibly marble if recrystallized

AI-generated identification · may be incorrect

Typically Mohs hardness 3, white to gray, dull to weakly vitreous luster, fine-grained carbonate texture, and calcite cleavage; effervesces strongly with dilute hydrochloric acid. The image appears to show a weathered, carved or inscribed surface rather than a natural unmodified outcrop.

Identified September 22, 2026More sedimentary →

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At a glance

Common name: Inscribed limestone fragment
Scientific name: Calcitic limestone (primarily CaCO₃), possibly marble if recrystallized
Category: sedimentary
Identified: September 22, 2026
Method: Standard

AI Estimated Value

Common fragment: $5–$50; authenticated historic or archaeological inscribed stone: hundreds to many thousands of dollars, depending on provenance and legality.

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

Forms from accumulated marine carbonate shells, lime mud, or chemical precipitation, commonly during the Mesozoic–Cenozoic; the inscription is human-made and its age cannot be determined from the image. If metamorphosed, it would be marble.

Uses & applications

Limestone is used for cement, aggregate, dimension stone, lime, and sculpture; inscribed architectural or archaeological pieces have historical and collectible value.

Geological facts

Calcite preserves inscriptions well when fine-grained, but acidic weathering erodes both stone and lettering. The markings may represent an archaeological inscription, gravestone, or architectural fragment.

Field identification & locations

Identify by its pale carbonate surface and acid reaction; examine grain size, fossils, and tool marks, and avoid cleaning or sampling if potentially archaeological. Common limestone occurs worldwide, especially in former shallow-marine basins.