
mineral
Native Gold Nugget
Gold (Au)
Mohs hardness: 2.5-3; Color: Golden-yellow, bright yellow to pale yellow; Luster: Metallic; Crystal structure: Isometric (cubic); Cleavage: None (hackly fracture); Specific gravity: 19.3 (very heavy)
- Hardness
- 2
- Color
- Golden-yellow, bright yellow to pale yellow
- Luster
- Metallic
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Physical properties
Mohs hardness: 2.5-3; Color: Golden-yellow, bright yellow to pale yellow; Luster: Metallic; Crystal structure: Isometric (cubic); Cleavage: None (hackly fracture); Specific gravity: 19.3 (very heavy)
Formation & geological history
Formed through hydrothermal veins associated with igneous intrusions or as placer deposits in rivers and streams, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Used in fine jewelry, electronics, monetary reserves, and investment-grade bullion.
Geological facts
Gold is extremely malleable and ductile; a single gram can be drawn into a wire one kilometer long. The region near the provided coordinates in Sudan/Ethiopia borderlands contains significant alluvial gold deposits.
Field identification & locations
Found in stream beds and alluvial gravels. Easily identified by its high density, softness (can be scratched with a copper coin), and resistance to tarnishing or acids.
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