mineral
Gold Nugget / Gold-bearing Quartz
Native Gold (Au)
Hardness: 2.5-3 (Gold) to 7 (Quartz); Color: Golden yellow to brassy with reddish-brown oxidation; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None.
- Hardness
- 2
- Color
- Golden yellow to brassy with reddish-brown oxidation
- Luster
- Metallic
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Physical properties
Hardness: 2.5-3 (Gold) to 7 (Quartz); Color: Golden yellow to brassy with reddish-brown oxidation; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None.
Formation & geological history
Hydrothermal formation where hot, mineral-rich fluids circulate through fractures in the earth's crust, often in quartz veins during orogenic (mountain-building) events.
Uses & applications
Primary source of gold for currency, jewelry, electronics, and medical applications. Small nuggets are highly collectible in their natural form.
Geological facts
Gold is one of the densest minerals on Earth and is extremely malleable. Most 'native' gold contains trace amounts of silver, copper, or iron.
Field identification & locations
Identify by its high specific gravity (it will feel heavy for its size) and its sectility (it can be cut or dented without shattering). Commonly found in placer deposits or within quartz veins.
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