mineral
Gold Ore (in Quartz/Pyrite)
Native Gold (Au) with Quartz (SiO2) and Pyrite (FeS2)
AI-generated identification · may be incorrectHardness: 2.5-3 (Gold), 7 (Quartz), 6-6.5 (Pyrite). Color: Metallic yellow, white, and brassy. Luster: Metallic to vitreous. Crystal structure: Isometric (Gold/Pyrite), Hexagonal (Quartz).
- Hardness
- 2
- Color
- Metallic yellow, white, and brassy
- Luster
- Metallic to vitreous
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Physical properties
Hardness: 2.5-3 (Gold), 7 (Quartz), 6-6.5 (Pyrite). Color: Metallic yellow, white, and brassy. Luster: Metallic to vitreous. Crystal structure: Isometric (Gold/Pyrite), Hexagonal (Quartz).
Formation & geological history
Formed in hydrothermal veins where hot, mineral-rich fluids circulate through crustal fractures. Often associated with volcanic activity and metamorphic mountain building.
Uses & applications
Primary source of gold for currency, electronics, jewelry, and investment. High-grade specimens are also kept as mineral collectibles.
Geological facts
Most of the world's gold is found in such small quantities that it is invisible to the naked eye; a 'rich' ore like this specimen is rare. Gold is the most malleable and ductile of all metals.
Field identification & locations
Identify by high density, metallic yellow color that doesn't tarnish, and sectility (ability to be cut with a knife). Common in tectonic plate boundaries like the Ring of Fire or the Sierra Nevada.
