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 occurs as dendritic, arborescent, or irregular masses); Cleavage: None; Specific Gravity: 15.5–19.3 (very high).

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

Identified July 7, 2026More mineral →

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Physical properties

Formation & geological history

Native gold typically forms in hydrothermal quartz veins within igneous and metamorphic rocks. Most nuggets are found in secondary 'placer' deposits where erosion has washed the gold into streams and rivers, concentrating it due to its high density.

Uses & applications

Used extensively in jewelry, electronics (due to high conductivity/corrosion resistance), dentistry, and as a store of monetary value (bouillon).

Geological facts

Gold is one of the least reactive chemical elements and is solid under standard conditions. Most nuggets found today are 70% to 95% pure gold, often alloyed with silver (electrum) or copper.

Field identification & locations

Identified in the field by its high density (feels very heavy for its size), extreme malleability (it will dent or bend rather than shatter when hit), and persistent metallic yellow streak. Common in areas with historic volcanic or tectonic activity.