mineral
Gold
Native Gold (Au)
Hardness: 2.5 to 3 on Mohs scale; Color: Golden yellow, but can be lighter to silver-white depending on silver content; Luster: Metallic; Crystal Structure: Isometric, cubic; Cleavage: None (hackly fracture); Specific Gravity: Extremely high, around 19.3.
- Hardness
- 2
- Luster
- Metallic
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Physical properties
Hardness: 2.5 to 3 on Mohs scale; Color: Golden yellow, but can be lighter to silver-white depending on silver content; Luster: Metallic; Crystal Structure: Isometric, cubic; Cleavage: None (hackly fracture); Specific Gravity: Extremely high, around 19.3.
Formation & geological history
Formed via hydrothermal veins, associated with quartz, or concentrated in placer deposits through weathering and erosion of primary rock over millions of years.
Uses & applications
Used primarily in jewelry, electronics, investment (bullion), and aerospace technology.
Geological facts
Gold is extraordinarily malleable and ductile; a single ounce can be beaten into a sheet covering 300 square feet. It does not tarnish or corrode over time.
Field identification & locations
Found globally in rivers, streams, and lode deposits. Identified by its heavy weight, bright yellow metallic luster, and inability to dissolve in single acids.
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