mineral
Gold
Native Gold (Au)
Hardness: 2.5-3.0; Color: Metallic yellow; Luster: Metallic; Crystal structure: Isometric (cubic); Cleavage: None; Specific gravity: 15.5-19.3
- Hardness
- 2
- Color
- Metallic yellow
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3.0; Color: Metallic yellow; Luster: Metallic; Crystal structure: Isometric (cubic); Cleavage: None; Specific gravity: 15.5-19.3
Formation & geological history
Typically formed in hydrothermal quartz veins or as secondary deposits in river gravels (placers) through weathering and erosion of primary ore bodies.
Uses & applications
Primary use in jewelry, currency, electronics for its conductivity, and medicine. High collector and investment value.
Geological facts
Gold is one of the densest and most malleable metals; a single ounce can be beaten into a sheet covering 100 square feet.
Field identification & locations
Identified by its high density, metallic luster that does not tarnish, and sectility (can be cut with a knife). Found in stream beds, mountains, and volcanic rocks.
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