mineral

Gold in Quartz Ore

Hydrothermal Quartz with native Gold (Au)

AI-generated identification · may be incorrect

Hardness: 7 (Quartz) / 2.5-3 (Gold); Color: Dark grey to white matrix with metallic yellow inclusions; Luster: Vitreous to greasy (quartz) and metallic (gold); Crystal Structure: Hexagonal (quartz) / Isometric (gold); Cleavage: None/Conchoidal.

Hardness: 7 (Quartz) / 2
Color: Dark grey to white matrix with metallic yellow inclusions
Luster: Vitreous to greasy (quartz) and metallic (gold)

Identified June 22, 2026More mineral →

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Physical properties

Formation & geological history

Formed through hydrothermal processes where hot, mineral-rich fluids circulate through fractures in the Earth's crust, often during orogenic (mountain-building) events. The gold precipitates alongside silica (quartz) and sulfide minerals.

Uses & applications

Primary source of bullion for currency and investment; highly valued in jewelry and electronics due to conductivity and corrosion resistance; major interest for geological collectors.

Geological facts

Most gold found in quartz veins is associated with iron pyrite (fool's gold), but can be distinguished by its malleability. Historically, 'quartz gold' spurred the California Gold Rush of 1849.

Field identification & locations

Identify in the field by looking for 'rusty' stained quartz (gossan) or heavy metallic yellow spots that do not shatter when poked with a needle. Commonly found in metamorphic terrains and near igneous intrusions.