mineral

Gold Nugget (Placer Gold)

Native Gold (Au)

AI-generated identification · may be incorrect

Hardness: 2.5-3.0 Mohs; Color: Golden yellow to brassy yellow; Luster: Metallic; Crystal Structure: Isometric (rarely seen in nuggets); Cleavage: None; Specific Gravity: 15.5-19.3 (very heavy)

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

Identified April 12, 2026More mineral →

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Physical properties

Hardness: 2.5-3.0 Mohs; Color: Golden yellow to brassy yellow; Luster: Metallic; Crystal Structure: Isometric (rarely seen in nuggets); Cleavage: None; Specific Gravity: 15.5-19.3 (very heavy)

Formation & geological history

Formed in hydrothermal quartz veins and subsequently eroded into stream beds. Placer deposits are created when water concentrates heavy minerals. These specimens can range from modern to millions of years old.

Uses & applications

Used primarily in jewelry, as currency/investment, in electronics due to high conductivity, and for mineral collecting.

Geological facts

Most gold nuggets found are 70% to 95% pure gold, often containing silver or copper. The largest gold nugget ever found was the 'Welcome Stranger' in Australia, weighing about 158 lbs.

Field identification & locations

Identified by its high density, 'malleability' (it dents rather than shatters when struck), and bright metallic streak. Can be found in riverbeds, especially behind large rocks or in deep crevices.