mineral

Polished metallic ore/mineral specimen, possibly pyrite-bearing schist

Indeterminate from image; likely pyrite (FeS₂) with quartz and/or mica in a metamorphic matrix

AI-generated identification · may be incorrect

Gray-silver, granular, sparkly surface with metallic to submetallic luster; apparent rounded polished ends. Pyrite hardness is 6–6.5 Mohs, cubic crystal system, brittle, and specific gravity about 5.0; the darker matrix may be schist or quartz-rich rock.

Identified September 5, 2026More mineral →

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At a glance

Common name: Polished metallic ore/mineral specimen, possibly pyrite-bearing schist
Scientific name: Indeterminate from image; likely pyrite (FeS₂) with quartz and/or mica in a metamorphic matrix
Category: mineral
Identified: September 5, 2026
Method: Standard

AI Estimated Value

About $5–$30 for small polished common specimens; $30–$100+ if crystals are unusually attractive, intact, or locality-labeled.

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 through hydrothermal mineralization or metamorphism, with sulfide crystals growing in fractured host rock; age depends on locality and cannot be determined visually.

Uses & applications

Small polished specimens are mainly sold for mineral collecting and lapidary display; pyrite is also an important historical source of sulfur and iron, though these pieces have little industrial value.

Geological facts

Pyrite is called “fool’s gold,” but it is typically paler, harder, and more brittle than gold. The image may also show polished pyrite-rich rock rather than a single mineral.

Field identification & locations

Look for brassy metallic color, cubic forms, black streak, and sparks when struck with steel; avoid tasting or grinding unknown sulfide minerals. Common localities include Peru, Spain, Italy, China, and the United States.