mineral

Gold

Native Gold (Au)

AI-generated identification · may be incorrect

Hardness: 2.5-3.0 (Mohs); Color: Golden yellow to brassy; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 19.3 (pure)

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

Identified March 15, 2026More mineral →

Explore Gold in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 2.5-3.0 (Mohs); Color: Golden yellow to brassy; Luster: Metallic; Crystal Structure: Isometric; Cleavage: None; Specific Gravity: 19.3 (pure)

Formation & geological history

Formed via hydrothermal veins, volcanic deposits, and sedimentary 'placer' deposits. Found in rocks of all geological ages, notably Precambrian through Cenozoic.

Uses & applications

Primary use in jewelry, investment/bullion, electronics, and medical/dental applications due to high conductivity and corrosion resistance.

Geological facts

Gold is incredibly ductile; a single ounce can be drawn into a wire 50 miles long. It is non-reactive and does not tarnish, which is why it has been a store of value for millennia.

Field identification & locations

Identify by its high density and malleability (doesn't crack when flattened). Commonly found in quartz veins or as rounded grains in river beds (black sands).