mineral

Likely galena-bearing ore fragment

Galena (PbS), possibly with oxidized sulfides or host rock

AI-generated identification · may be incorrect

Small metallic gray, irregular fragments with bright reflective faces; galena has Mohs hardness 2.5–2.75, cubic crystals and perfect cubic cleavage, with very high specific gravity (~7.5). The image is insufficient for confirming crystal form or composition.

Identified August 18, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms chiefly in hydrothermal lead-zinc veins, commonly with sphalerite, quartz, and calcite, from low- to moderate-temperature fluids; ages range from Precambrian to modern geological deposits.

Uses & applications

Historically an important lead ore used for batteries, radiation shielding, ammunition, and pigments; attractive crystals are collected, but specimens should be handled carefully because lead-bearing dust is toxic.

Geological facts

Its unusually heavy feel and metallic luster are key clues; fresh galena commonly breaks into shiny cubic fragments. The pictured pieces could also be metallic slag or another sulfide mineral without testing.

Field identification & locations

Common localities include Missouri and Illinois, USA; the Tri-State district, USA; Peru; Mexico; Australia; and China. Confirm with heft, streak (lead-gray), a hardness test, and ideally specific-gravity or XRF testing; avoid inhaling dust and wash hands.