mineral

Gold

Native Gold (Au)

Hardness: 2.5-3 (Mohs scale), Color: Golden yellow, Luster: Metallic, Crystal Structure: Isometric (cubic), Cleavage: None/Indistinct, Specific Gravity: 19.3 (pure)

Hardness: 2

Identified March 15, 2026More mineral →

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Physical properties

Hardness: 2.5-3 (Mohs scale), Color: Golden yellow, Luster: Metallic, Crystal Structure: Isometric (cubic), Cleavage: None/Indistinct, Specific Gravity: 19.3 (pure)

Formation & geological history

Formed in hydrothermal veins created by volcanic activity and concentrated in placer deposits through erosion of source rocks; found in all geological ages from Archean to more recent.

Uses & applications

Primary use in jewelry and bullion (monetary reserve), high-end electronics due to conductivity and corrosion resistance, dentistry, and aerospace.

Geological facts

Gold is incredibly ductile; a single ounce can be drawn into a wire 50 miles long. It is also chemically inert, meaning it does not rust or tarnish in air or water.

Field identification & locations

Identify in the field by its high density (heavy weight), extreme malleability (it bends rather than breaks), and yellow streak. Commonly found in quartz veins or as nuggets/grains in river beds.