mineral
Gold Nugget
Native Gold (Au)
Hardness: 2.5-3; Color: Golden-yellow; Luster: Metallic; Crystal Structure: Isometric (rarely visible in nuggets); Cleavage: None; Specific Gravity: 19.3 (pure)
- Hardness
- 2
- Color
- Golden-yellow
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3; Color: Golden-yellow; Luster: Metallic; Crystal Structure: Isometric (rarely visible in nuggets); Cleavage: None; Specific Gravity: 19.3 (pure)
Formation & geological history
Formed in hydrothermal quartz veins and concentrated by erosion into alluvial placer deposits. Geological age spans from Archean to recent.
Uses & applications
Basis for monetary systems, high-end jewelry, electronics (excellent conductor), and a highly sought-after investment/collector item.
Geological facts
Nuggets are rare natural concentrations of gold that have survived the abrasive transport of river systems. The largest ever found was the 'Welcome Stranger' in Australia, weighing 72 kg.
Field identification & locations
Identified by its high density, extreme malleability (it bends rather than shatters), and yellow streak. Found in gold-bearing river gravels or lode deposits.
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