mineral

Gold and Silver (in jewelry form)

Gold (Au) and Silver (Ag)

Hardness: 2.5-3 (Mohs scale); Color: Metallic yellow and metallic white; Luster: Highly metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: Gold 19.3, Silver 10.5

Hardness: 2
Color: Metallic yellow and metallic white
Luster: Highly metallic

Identified March 28, 2026More mineral →

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Physical properties

Hardness: 2.5-3 (Mohs scale); Color: Metallic yellow and metallic white; Luster: Highly metallic; Crystal Structure: Isometric (cubic); Cleavage: None; Specific Gravity: Gold 19.3, Silver 10.5

Formation & geological history

Formed in hydrothermal veins and alluvial deposits. Native elements concentrated by volcanic activity or tectonic pressure. Primary deposits often found in quartz veins; secondary deposits in river gravels (placer gold).

Uses & applications

Dominantly used in jewelry, currency, electronics/precision instruments (conductors), and dentistry (crowns/fillings).

Geological facts

Native metals like gold and silver were among the first known to ancient civilizations because they occur in pure form in nature and are highly malleable. The largest gold nugget ever found was the 'Welcome Stranger' in Australia, weighing over 70kg.

Field identification & locations

Identify in the field by high density (heavy for size), extreme malleability (dents rather than shatters), and lack of tarnish (for gold) or black sulfide oxidation (for silver). Common in mountainous regions with igneous activity.

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