mineral
Gold Nugget
Gold (Au)
AI-generated identification · may be incorrectHardness: 2.5-3 on Mohs scale; Color: Golden yellow to yellow-orange; Luster: Metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: Extremely high (approx. 19.3 g/cm³)
- Hardness
- 2
- Color
- Golden yellow to yellow-orange
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3 on Mohs scale; Color: Golden yellow to yellow-orange; Luster: Metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: Extremely high (approx. 19.3 g/cm³)
Formation & geological history
Formed through hydrothermal processes where gold-bearing fluids circulate through faults and fractures in the Earth's crust, depositing gold as veins, or weathered out and concentrated in alluvial placer deposits over millions of years.
Uses & applications
Used in jewelry, financial reserves (bullion), electronics, and dentistry.
Geological facts
Gold is extremely malleable and ductile; a single gram can be drawn into a wire one kilometer long or hammered into a thin sheet.
Field identification & locations
Identified by its high density, distinctive metallic yellow color, malleability (does not shatter when struck), and lack of reactivity to acid. Commonly found in placer gravels and quartz veins worldwide.
