mineral
Gold
Native Gold (Au)
Hardness: 2.5–3 on Mohs scale; Color: Metallic yellow; Luster: Metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: 19.3
- Hardness
- 2
- Color
- Metallic yellow
- Luster
- Metallic
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Physical properties
Hardness: 2.5–3 on Mohs scale; Color: Metallic yellow; Luster: Metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: 19.3
Formation & geological history
Formed through hydrothermal processes, often in quartz veins, or concentrated in alluvial 'placer' deposits through erosion. Geological age varies from Archean to recent.
Uses & applications
Primary use in jewelry, investment/bullion, electronics (excellent conductor), dentistry, and aerospace technology.
Geological facts
Gold is incredibly ductile; a single ounce can be drawn into a wire 50 miles long. It is chemically inert and does not tarnish or rust under normal conditions.
Field identification & locations
Identified in the field by its high density, 'malleability' (it dents rather than shatters), and persistent yellow color in shade. Commonly found in quartz veins or panning in riverbeds.
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