mineral

Metallic sulfide ore fragment, possibly pyrite-bearing rock

Indeterminate; likely pyrite (FeS₂) in a sulfide-rich matrix

AI-generated identification · may be incorrect

Small, irregular dark-brown metallic fragment with dull-to-metallic luster and granular texture; apparent hardness about 5–6 if pyrite is present, but composition cannot be confirmed from the image. Crystal form and cleavage are not visible.

Identified August 13, 2026More mineral →

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Physical properties

Formation & geological history

Probably a natural sulfide-mineral fragment formed in hydrothermal veins or sedimentary/volcanic ore deposits; age depends on its source locality and cannot be determined visually.

Uses & applications

Potentially a mineral-collecting specimen or ore fragment; sulfide ores can be sources of iron, copper, lead, zinc, or precious metals, but this piece has no reliable commercial value without testing.

Geological facts

Pyrite commonly forms brassy cubic crystals, while weathered masses may appear brown or nearly black. A streak test, magnetism test, density measurement, and chemical or X-ray analysis would be needed for identification.

Field identification & locations

Look for brassy metallic color, cubic crystals, dark greenish-black streak, and no strong magnetism for pyrite; avoid handling unknown sulfides extensively because oxidation can produce acidic residues. Common occurrences include hydrothermal veins and sediment-hosted deposits worldwide.