mineral
Gold Nugget
Native Gold (Au)
Hardness: 2.5-3.0 Mohs; Color: Rich golden yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 15.5-19.3
- Hardness
- 2
- Color
- Rich golden yellow
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3.0 Mohs; Color: Rich golden yellow; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 15.5-19.3
Formation & geological history
Primary formation typically occurs in hydrothermal quartz veins during orogenic cycles. Secondary 'nugget' formation occurs through erosion and concentration in alluvial (placer) deposits.
Uses & applications
Primary use as currency and investment (bullion), high-end jewelry, electronics (due to high conductivity), and aerospace technology.
Geological facts
Gold is the most malleable and ductile metal known; a single ounce can be beaten into a sheet covering 100 square feet. It is chemically inert and does not tarnish.
Field identification & locations
Identify by high density (heavy for its size), malleability (it will dent or flatten under pressure rather than shatter), and sector-leading metallic luster that persists in shade.
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