mineral
Gold-bearing Quartz
Native Gold (Au) in Quartz (SiO2) matrix
AI-generated identification · may be incorrectHardness: 2.5-3 for gold, 7 for quartz; Color: Metallic yellow gold in gray-white quartz; Luster: Metallic gold, vitreous quartz; Crystal system: Isometric (gold), Trigonal (quartz).
- Hardness
- 2
- Color
- Metallic yellow gold in gray-white quartz
- Luster
- Metallic gold, vitreous quartz
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Physical properties
Hardness: 2.5-3 for gold, 7 for quartz; Color: Metallic yellow gold in gray-white quartz; Luster: Metallic gold, vitreous quartz; Crystal system: Isometric (gold), Trigonal (quartz).
Formation & geological history
Formed via hydrothermal processes where hot, mineral-rich fluids circulate through crustal fractures, depositing gold and silica as they cool; often found in Precambrian or Mesozoic formations.
Uses & applications
Primary source of gold for industrial electronics, jewelry, and financial investment; highly valued by mineral collectors for natural aesthetics.
Geological facts
Most gold found by prospectors is associated with quartz veins. Native gold is one of the densest minerals, with a specific gravity of 19.3 when pure.
Field identification & locations
Identified by the distinct sectile nature of gold compared to brittle pyrite, and Its weight. Commonly found in mountainous regions near fault lines or in placer deposits.
