mineral
Gold Nugget
Native Gold (Au)
AI-generated identification · may be incorrectHardness: 2.5-3.0 Mohs; Color: Golden yellow to brassy; Luster: Metallic; Crystal Structure: Isometric (rarely visible in nuggets); SG: 19.3 (very high); Malleable and ductile.
- Hardness
- 2
- Color
- Golden yellow to brassy
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3.0 Mohs; Color: Golden yellow to brassy; Luster: Metallic; Crystal Structure: Isometric (rarely visible in nuggets); SG: 19.3 (very high); Malleable and ductile.
Formation & geological history
Formed in hydrothermal quartz veins via precipitation from hot, mineral-rich fluids. Often found as secondary deposits in riverbeds (alluvial placers) where they have been concentrated by erosion and water flow.
Uses & applications
Primary source of monetary gold, highly valued for jewelry, electronic components, medical applications, and as high-end collector specimens.
Geological facts
Unlike many other minerals, gold is a native element. The largest nugget ever found, the 'Welcome Stranger', weighed over 70 kg. Gold is so malleable that a single gram can be beaten into a one-square-meter sheet.
Field identification & locations
Identified in the field by its high density, metallic luster, and sectility (you can dent it with a pin without it shattering). Look for it in gravel bars on the inside bends of streams or in quartz outcroppings.
