mineral
Native gold nugget
Native gold (Au), often containing minor silver and copper
AI-generated identification · may be incorrectMohs hardness 2.5–3; metallic luster and yellow-gold color, with irregular, malleable shape. Crystallizes in the isometric system, but nuggets are commonly massive and lack visible crystal faces; specific gravity is about 15–19.3.
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Physical properties
Mohs hardness 2.5–3; metallic luster and yellow-gold color, with irregular, malleable shape. Crystallizes in the isometric system, but nuggets are commonly massive and lack visible crystal faces; specific gravity is about 15–19.3.
Formation & geological history
Forms when gold-bearing hydrothermal fluids deposit gold in veins, or when weathering releases it into stream gravels. Gold deposits range from ancient Archean terrains to much younger geological settings.
Uses & applications
Used in jewelry, investment, electronics, dentistry, and scientific collections.
Geological facts
Gold is exceptionally dense, chemically resistant, and can be hammered into extremely thin sheets. Its purity is commonly measured in karats or fineness.
Field identification & locations
Identify by its rich yellow color, high density, softness, and malleability; unlike many imitations, it will flatten rather than crumble when struck. Found in quartz veins and placer deposits worldwide, including Australia, South Africa, Canada, and the western United States.
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