mineral

Gold-bearing sulfide ore (tentative)

Native gold, likely with pyrite/chalcopyrite in quartz or altered rock

AI-generated identification · may be incorrect

Brassy yellow, metallic to earthy luster, irregular granular texture; apparent hardness about 3–6 depending on matrix. Native gold is very soft (Mohs 2.5–3), malleable, and nonmagnetic, while pyrite is harder (6–6.5) and brittle.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Likely hydrothermal mineralization in quartz veins or altered volcanic/metamorphic host rock; deposits range from ancient Precambrian to much younger Cenozoic ages.

Uses & applications

Gold ore may be economically processed for precious-metal recovery; attractive pieces are collected, but value depends on verified gold content rather than appearance.

Geological facts

The image alone cannot distinguish native gold from pyrite (“fool’s gold”) or chalcopyrite. Real gold commonly forms rounded grains or malleable flakes; pyrite tends to show sharp cubic crystals.

Field identification & locations

Common in gold districts worldwide, including Australia, Canada, the western United States, and South Africa. Test with streak, density, magnetism, and professional assay: gold leaves a yellow streak and bends, whereas pyrite leaves a dark streak and crumbles; avoid destructive acid tests.