mineral

Likely native metallic mineral specimen

Uncertain from photograph; possibly pyrite (FeS₂) or a sulfide-rich metallic ore

AI-generated identification · may be incorrect

Small, rough, dark gray-black metallic mass with bright brassy reflective grains and irregular texture. Pyrite has Mohs hardness 6–6.5, cubic crystals, metallic luster, and pale brass-yellow color; the specimen’s apparent softness and shape are not diagnostic.

Identified September 7, 2026More mineral →

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Physical properties

Formation & geological history

If pyrite, it formed hydrothermally or in sedimentary environments through sulfide mineral precipitation, commonly from Paleozoic to younger deposits. Exact identification requires hardness, streak, density, and chemical testing.

Uses & applications

Pyrite is collected, used historically as a sulfur source, and occasionally as an ornamental mineral; sulfide ores may be economically important for copper, lead, zinc, or precious metals.

Geological facts

Pyrite is called “fool’s gold,” but its crystals are typically cubic or pyritohedral, unlike gold’s malleable flakes. The image may also show a metallic ore fragment or artificial-coated specimen.

Field identification & locations

Check whether it scratches glass, produces a greenish-black streak, and feels unusually heavy; gold leaves a yellow streak and is malleable, while pyrite is brittle. Common sources include Spain, Peru, China, and the United States.