metamorphic

Dark, mica-rich metamorphic rock (possibly schist)

Mica schist, tentatively; exact identification is limited by the small, partly obscured specimen

AI-generated identification · may be incorrect

Dark gray to black with a coarse, sparkly appearance and apparent flaky mica; likely Mohs hardness 2–7 depending on mineral grains. Schist commonly has aligned platy crystals and a foliated texture; no reliable cleavage or specific gravity can be determined from the image.

Identified September 26, 2026More metamorphic →

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At a glance

Common name: Dark, mica-rich metamorphic rock (possibly schist)
Scientific name: Mica schist, tentatively; exact identification is limited by the small, partly obscured specimen
Category: metamorphic
Identified: September 26, 2026
Method: Standard

AI Estimated Value

Approximately $0–$5 for a small, ordinary fragment; more only if a definite, attractive specimen is identified.

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

Likely formed when clay-rich sedimentary rock was buried and altered by heat and pressure, aligning mica minerals into foliation. Such rocks formed in many geological periods and tectonic mountain belts.

Uses & applications

Schist is used locally as decorative stone, paving, and landscaping material; attractive pieces may be collected, but this specimen appears small and unprepared.

Geological facts

Mica’s reflective flakes can make schist glitter, while its layered fabric may split along foliation.

Field identification & locations

Look for visible aligned mica flakes and a tendency to break into sheets; common in metamorphic belts worldwide. The image does not show enough detail to confirm schist or distinguish it from another dark, mica-bearing rock.