mineral
Gold
Native Gold (Au)
AI-generated identification · may be incorrectHardness: 2.5-3.0 (Mohs); Color: Golden yellow to brassy; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 19.3 (pure)
- Hardness
- 2
- Color
- Golden yellow to brassy
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3.0 (Mohs); Color: Golden yellow to brassy; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 19.3 (pure)
Formation & geological history
Formed via hydrothermal veins, volcanic deposits, and sedimentary 'placer' deposits. Found in rocks of all geological ages, notably Precambrian through Cenozoic.
Uses & applications
Primary use in jewelry, investment/bullion, electronics, and medical/dental applications due to high conductivity and corrosion resistance.
Geological facts
Gold is incredibly ductile; a single ounce can be drawn into a wire 50 miles long. It is non-reactive and does not tarnish, which is why it has been a store of value for millennia.
Field identification & locations
Identify by its high density and malleability (doesn't crack when flattened). Commonly found in quartz veins or as rounded grains in river beds (black sands).
