metamorphic

Foliated metamorphic rock, likely marble or calc-schist

Calcite-rich marble/calc-schist; predominantly CaCO₃ (calcite), with possible mica and quartz

AI-generated identification · may be incorrect

Gray-white, fine- to medium-grained, weakly foliated and sugary to dull in luster; likely Mohs 3–4 if calcite-rich. The rounded shape is natural abrasion or weathering, not crystal form; cleavage is not clearly visible. A drop of dilute hydrochloric acid should fizz strongly if calcitic.

Identified August 17, 2026More metamorphic →

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At a glance

Common name: Foliated metamorphic rock, likely marble or calc-schist
Scientific name: Calcite-rich marble/calc-schist; predominantly CaCO₃ (calcite), with possible mica and quartz
Category: metamorphic
Identified: August 17, 2026
Method: Standard

AI Estimated Value

$0–$10 as a common hand specimen; approximately $10–$50 if unusually attractive, polished, or confirmed as a collectible mineral specimen.

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

Recrystallized limestone or calcareous shale during regional metamorphism, with pressure producing the subtle layered texture. Such rocks commonly formed during Mesozoic–Cenozoic mountain-building; exact age cannot be determined from the photograph.

Uses & applications

Marble is used for tiles, aggregate, monuments, and sculpture; attractive pieces may be polished as decorative stone. An ordinary beach or stream-worn cobble has little commercial value.

Geological facts

The surface texture resembles weathered calcite-rich marble more than a typical igneous rock. The reported location in southern Turkey is geologically plausible because the Taurus region contains abundant metamorphosed carbonate rocks.

Field identification & locations

Likely identification: gray marble or calcareous schist, but visual certainty is moderate. Test streak (white), acid reaction, and hardness: calcite is scratched by a steel knife, while quartz-rich material is not; check for visible mica flakes or thin foliation. Common in Turkish Taurus metamorphic belts and river gravels.