metamorphic

Weathered iron-rich metamorphic rock, possibly schist or metabasalt

Provisional identification: chlorite–quartz–feldspar schist or altered basalt; exact mineralogy requires testing

AI-generated identification · may be incorrect

Gray-brown, fine- to medium-grained, weakly foliated and rough, with rusty iron-oxide staining and possible mica flakes. Estimated Mohs hardness 5–6; dull to slightly silky luster, no obvious cleavage or crystals visible; density likely about 2.8–3.2 g/cm³.

Identified September 20, 2026More metamorphic →

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At a glance

Common name: Weathered iron-rich metamorphic rock, possibly schist or metabasalt
Scientific name: Provisional identification: chlorite–quartz–feldspar schist or altered basalt; exact mineralogy requires testing
Category: metamorphic
Identified: September 20, 2026
Method: Standard

AI Estimated Value

About $2–$15 as an ordinary specimen; potentially $20–$75 if confirmed to contain unusual minerals or attractive metallic mineralization.

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 basaltic or sedimentary material was buried, heated, and variably altered during regional metamorphism; surface oxidation produced the brown-red staining. Geological age cannot be determined from the photograph and may range from Precambrian to much younger.

Uses & applications

Typically used as a field specimen, landscaping stone, or aggregate if abundant; not normally suitable for jewelry unless it contains attractive mineralization.

Geological facts

The metallic-looking flecks may be mica, pyrite, or iron oxides, but the image does not resolve them reliably. A streak, hardness, magnetism, and acid test would substantially improve identification.

Field identification & locations

Look for foliation, mica sparkle, a pale or dark streak, and possible magnetism; compare with nearby outcrops because regional geology is decisive. Common equivalents occur in metamorphic belts worldwide.