mineral
Native silver (probable)
Elemental silver, Ag, likely with oxidized sulfide or copper minerals
AI-generated identification · may be incorrectA tiny irregular metallic-gray to silver-white specimen with porous, spongy texture and dark cavities; native silver is malleable, opaque, and has metallic luster, Mohs hardness 2.5–3, cubic crystal structure, and no cleavage. The image alone cannot confirm composition;…
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Physical properties
A tiny irregular metallic-gray to silver-white specimen with porous, spongy texture and dark cavities; native silver is malleable, opaque, and has metallic luster, Mohs hardness 2.5–3, cubic crystal structure, and no cleavage. The image alone cannot confirm composition; similar appearance can result from galena, silver-bearing sulfides, or metallic slag.
Formation & geological history
Native silver forms in hydrothermal veins and oxidation zones, commonly with quartz, calcite, galena, and silver sulfides; deposits range from Precambrian to modern geological ages. Its porous texture may reflect weathering or dissolution of associated minerals.
Uses & applications
Historically used for coinage, electronics, solder, mirrors, photography, and jewelry; attractive native specimens are collectible. Industrial value depends mainly on assayable silver content.
Geological facts
Silver tarnishes gray or black through sulfur-bearing reactions and is unusually ductile. A streak test, density measurement, and X-ray fluorescence or chemical assay are needed for reliable identification.
Field identification & locations
Common sources include Mexico, Peru, Bolivia, Canada, the United States, and Australia. Test cautiously: native silver leaves a silvery streak and is easily cut or bent; avoid destructive acid testing without expertise.
