mineral

Gold Nugget

Native Gold (Au)

AI-generated identification · may be incorrect

Hardness: 2.5-3.0 Mohs; Color: Rich metallic yellow; Luster: Metallic; Crystal Structure: Isometric/Cubic (usually found as irregular masses); Cleavage: None; Specific Gravity: ~19.3 (very heavy).

Hardness: 2
Color: Rich metallic yellow
Luster: Metallic

Identified April 11, 2026More mineral →

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Physical properties

Hardness: 2.5-3.0 Mohs; Color: Rich metallic yellow; Luster: Metallic; Crystal Structure: Isometric/Cubic (usually found as irregular masses); Cleavage: None; Specific Gravity: ~19.3 (very heavy).

Formation & geological history

Formed from hydrothermal veins deep in the Earth's crust, often associated with quartz. Over millions of years, erosion releases the gold into 'placer' deposits in riverbeds and streams.

Uses & applications

Primary source for investment (bullion), jewelry, electronics, and medical applications due to its high conductivity and resistance to corrosion.

Geological facts

Gold is so malleable that a single ounce can be beaten into a sheet 300 feet square. It is chemically inert, meaning it won't tarnish or rust when exposed to air or water.

Field identification & locations

Identify by its high density (it feels much heavier than stones of similar size) and its 'sectility' (it can be cut or dented with a knife without shattering). Found in gold-bearing regions like California, Alaska, and Australia.