mineral

Gold-bearing quartz vein in dark host rock

Native gold (Au) with quartz (SiO₂), likely in a mafic or metamorphic host

AI-generated identification · may be incorrect

Visible yellow metallic native gold occurs as irregular flakes or veinlets in a dark, fine-grained matrix. Gold has Mohs hardness 2.5–3, very high density (~19.3), bright metallic luster, and malleability; quartz is hardness 7 and vitreous.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Hydrothermal fluids deposited gold and quartz in fractures, commonly during Precambrian to younger orogenic mineralization; the exact age and host cannot be determined from the photograph.

Uses & applications

Primarily a collectible or assay specimen; native gold is used in jewelry, electronics, dentistry, and investment, while quartz has industrial and ornamental uses.

Geological facts

Gold is notably malleable and will flatten rather than crumble when pressed; true gold is not attracted to a magnet and does not tarnish readily.

Field identification & locations

Commonly found in quartz veins and greenstone belts, especially in Australia, Canada, California, Alaska, and South Africa. A streak, density test, magnet test, and professional assay help distinguish gold from pyrite or mica.