mineral

Gold Nugget

Native Gold (Au)

Hardness: 2.5–3.0 on Mohs scale; Color: Golden yellow to brassy yellow; Luster: Metallic; Crystal Structure: Isometric/Cubic (often found as irregular masses); Cleavage: None; Specific Gravity: 19.3 (pure), roughly 15-18 for natural nuggets.

Hardness: 2
Color: Golden yellow to brassy yellow
Luster: Metallic

Identified April 12, 2026More mineral →

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Physical properties

Formation & geological history

Formed in hydrothermal quartz veins from hot, mineral-rich fluids deep within the Earth's crust. Released through erosion and concentrated in riverbeds as 'placer' deposits due to its high density. Geological age varies greatly, often Precambrian to Mesozoic.

Uses & applications

Primary source for investment, currency, and jewelry. Used extensively in electronics for high-grade conductors and in dentistry.

Geological facts

Gold is incredibly ductile; a single ounce can be beaten into a sheet covering 100 square feet. Most gold found in rivers is about 75% to 95% pure, with the remaining part usually being silver or copper.

Field identification & locations

Identify by its high weight (density) compared to its size, its lack of cleavage (it dents or shapes rather than shattering when struck), and its golden streak. Common in areas with historical volcanic or tectonic activity.