mineral

Gold Ore

Native Gold (Au)

Hardness: 2.5–3 on Mohs scale; Color: Golden-yellow to brassy; Luster: Metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: 19.3 (when pure).

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

Identified April 11, 2026More mineral →

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Physical properties

Hardness: 2.5–3 on Mohs scale; Color: Golden-yellow to brassy; Luster: Metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: 19.3 (when pure).

Formation & geological history

Formed through hydrothermal processes, typically within quartz veins during volcanic activity or deposited in sedimentary placer deposits through erosion of primary sources over millions of years.

Uses & applications

Primary source for monetary currency backing, jewelry, electronics (due to high conductivity), and dentistry. High value as a collector specimen.

Geological facts

Gold is incredibly malleable; a single ounce can be beaten into a sheet covering 100 square feet. It is one of the fewest elements that is chemically unreactive (noble metal), meaning it doesn't rust or tarnish.

Field identification & locations

Identify by its heavy weight (high density), metallic gold streak, and malleability (it will dent rather than shatter). Found commonly in quartz or associated with pyrite in regions with tectonic or volcanic history.