mineral
Gold Nugget
Native Gold (Au)
Hardness: 2.5–3.0 on Mohs scale; Color: Golden-yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 15.5–19.3 (very heavy)
- Hardness
- 2
- Color
- Golden-yellow
- Luster
- Metallic
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Physical properties
Hardness: 2.5–3.0 on Mohs scale; Color: Golden-yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 15.5–19.3 (very heavy)
Formation & geological history
Formed through hydrothermal processes in quartz veins or as secondary accumulations in alluvial 'placer' deposits. Often found in Precambrian to Cenozoic geological formations.
Uses & applications
Primarily used for investment (bullion), jewelry, electronics, and aerospace due to its high conductivity and resistance to corrosion.
Geological facts
About 80% of the world's gold is still embedded in rock. The largest gold nugget ever found was the 'Welcome Stranger' in Australia, weighing 72 kg.
Field identification & locations
Identify by its high density (feels heavy for its size), extreme malleability (it will dent, not shatter), and consistent yellow streak. Found in stream beds and mountainous regions.
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