mineral

Tumbled metallic sulfide mineral specimen, likely pyrite-bearing ore

Likely pyrite (FeS₂) with associated sulfides and host rock; exact identification requires testing

AI-generated identification · may be incorrect

Dark gray to brassy metallic luster with granular, irregular texture; pyrite hardness 6–6.5 Mohs, cubic crystal system, poor cleavage, and specific gravity about 5.0. The rounded shape indicates tumbling or natural abrasion.

Identified August 13, 2026More mineral →

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At a glance

Common name: Tumbled metallic sulfide mineral specimen, likely pyrite-bearing ore
Scientific name: Likely pyrite (FeS₂) with associated sulfides and host rock; exact identification requires testing
Category: mineral
Identified: August 13, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small common tumbled specimen; $20–$100+ if unusually attractive or confirmed to contain valuable associated minerals.

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

Sulfide minerals commonly form in hydrothermal veins, sedimentary exhalative deposits, and magmatic sulfide ores, ranging from Precambrian to recent geological ages. The mixed appearance suggests a small ore fragment rather than a single crystal.

Uses & applications

Collected as an attractive mineral specimen and used industrially as a sulfur source; pyrite is not typically used as a gemstone. Associated sulfide ores may be economically important for copper, nickel, lead, zinc, or precious metals.

Geological facts

Pyrite is called “fool’s gold,” but it is usually harder, more brittle, and less malleable than gold. A streak test and hardness test help distinguish it from gold and polished hematite.

Field identification & locations

Look for metallic brassy grains, dark streak or powder, high density, and possible cubic crystal remnants; avoid relying on color alone. Common localities include Spain, Peru, Italy, China, and many sulfide-mining districts worldwide.