mineral

Silver (S925)

Native Silver (Ag)

Hardness: 2.5-3 (Mohs scale), Color: Silvery-white (tarnishes to black), Luster: Metallic, Crystal structure: Isometric/Cubic, Cleavage: None, Specific gravity: 10.5

Hardness: 2

Identified January 22, 2026More mineral →

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Physical properties

Hardness: 2.5-3 (Mohs scale), Color: Silvery-white (tarnishes to black), Luster: Metallic, Crystal structure: Isometric/Cubic, Cleavage: None, Specific gravity: 10.5

Formation & geological history

Formed in hydrothermal veins and the oxidation zones of ore deposits. It occurs as a primary mineral in hydrothermal systems and can be across various geological ages.

Uses & applications

Primary use in jewelry (sterling silver), electronics due to high conductivity, coinage, photography (silver halides), and antimicrobial medical applications.

Geological facts

Silver is the most conductive and reflective element on Earth. The S925 stamp indicates Sterling Silver, which is 92.5% pure silver alloyed with 7.5% other metals, usually copper.

Field identification & locations

Identify by its high metallic luster, malleability, and hallmark stamps (like S925 or 925) in finished jewelry. In nature, look for its distinctive wiry or dendritic crystal habit.