mineral

Sulfide Ore (likely Galena and Sphalerite in Quartz)

Lead-Zinc Ore (PbS and ZnS)

Hardness: 2.5 (Galena) to 4 (Sphalerite); Color: Lead-gray to brownish-yellow; Luster: Metallic to sub-metallic/adamantine; Crystal Structure: Isometric; Cleavage: Perfect cubic (Galena); Specific Gravity: 7.4-7.6 (Galena), 3.9-4.1 (Sphalerite)

Hardness: 2
Color: Lead-gray to brownish-yellow
Luster: Metallic to sub-metallic/adamantine

Identified March 4, 2026More mineral →

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Physical properties

Formation & geological history

Hydrothermal vein deposits formed from hot, mineral-rich fluids circulating through rock fractures, typically during periods of mountain building or volcanic activity.

Uses & applications

Primary source of lead and zinc metals. Used in batteries, alloys, galvanizing steel, and as mineral specimens for collectors.

Geological facts

Galena is the most important ore of lead and was used in ancient Egypt as eye makeup (kohl). It often contains significant amounts of silver as an impurity.

Field identification & locations

Identify by high density (heaviness), metallic luster, and cubic cleavage. Found in mining districts such as the tri-state area of the US, Mexico, and Australia. Collectors should look for well-defined crystal faces and association with quartz or calcite.

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