
mineral
Placer Gold Nugget
Native Gold (Au)
Hardness: 2.5-3.0 Mohs; Color: Rich golden yellow; Luster: Metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: 19.3 (very heavy)
- 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 (cubic); Cleavage: None; Specific Gravity: 19.3 (very heavy)
Formation & geological history
Formed in hydrothermal veins at high temperatures, then eroded out of host rock and transported by water into stream beds (placer deposit). Geological age varies widely by location.
Uses & applications
Used as a primary source for gold in currency, electronics, jewelry, and as a hedge against inflation for investors/collectors.
Geological facts
Gold is incredibly ductile; a single ounce can be beaten into a sheet covering 100 square feet. This specimen appears as an elongated, water-worn nugget in a gold pan.
Field identification & locations
Identify by its high density (it won't move easily when panned), metallic luster that remains bright in shade, and its malleability (it dents rather than shatters if struck). Found in river bends and gravel bars.
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