mineral

Gold

Native Gold (Au)

AI-generated identification · may be incorrect

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

Hardness: 2
Color: Metallic yellow
Luster: Metallic

Identified March 20, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through hydrothermal processes in quartz veins, or concentrated in sedimentary environments as placer deposits. Geological age varies widely from Archean to recent.

Uses & applications

Primary use in jewelry, investment/currency bullion, high-end electronics, and dentistry due to its conductivity and resistance to oxidation.

Geological facts

Gold is so extremely ductile that a single ounce can be stretched into a wire five miles long. It is a 'noble metal,' meaning it does not rust or tarnish under normal conditions.

Field identification & locations

Identify in the field by its distinct yellow streak, extreme density, and malleability (it will dent or bend rather than shatter). Commonly found in California, South Africa, Australia, and Alaska.