mineral
Gold Nugget
Native Gold (Au)
Hardness: 2.5-3.0 Mohs; Color: Metallic yellow to gold; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None (malleable); Specific Gravity: 19.3
- Hardness
- 2
- Color
- Metallic yellow to gold
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3.0 Mohs; Color: Metallic yellow to gold; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None (malleable); Specific Gravity: 19.3
Formation & geological history
Formed in hydrothermal quartz veins by precipitation from hot fluids; typically released into alluvial deposits through erosion and weathering of mountain ranges.
Uses & applications
Used extensively in jewelry, electronics for conductivity, investment (bullion), and dental applications.
Geological facts
Gold is one of the most chemically inert elements, meaning it does not tarnish or rust. It is so malleable that a single ounce can be beaten into a sheet covering 300 square feet.
Field identification & locations
Identify in the field by its high weight (density), extreme malleability (it bends rather than shatters), and persistent yellow color even in shade. Found in stream beds (placer) and quartz veins.
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