Where is Native Silver found?
Silver (Ag)
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Open the appNative Silver occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Native Silver
Kongsberg, Norway
Historically famous for large and spectacular native silver specimens, including wire silver, found in calcite veins within Precambrian gneisses.
Freiberg, Saxony, Germany
A classic locality for native silver, often found in hydrothermal veins with other silver minerals and sulfides.
Potosí, Bolivia
Known for massive silver deposits, including native silver, in hydrothermal veins associated with volcanic rocks.
Batopilas, Chihuahua, Mexico
Famous for large, intricate wire silver specimens and dendritic forms in calcite veins.
Michigan Copper District, USA
While primarily known for native copper, native silver also occurs in association with copper in basaltic lavas and conglomerates.
Broken Hill, New South Wales, Australia
A significant lead-zinc-silver deposit where native silver can be found in the oxidized zones.
Collecting tips
- Look for Associated Minerals. Native silver is often found with other sulfide minerals like galena (lead sulfide), sphalerite (zinc sulfide), chalcopyrite (copper iron sulfide), and various silver sulfosalts. Calcite and quartz are common gangue minerals.
- Examine Oxidized Zones. In the upper, oxidized portions of silver-bearing ore deposits, native silver can form through supergene enrichment processes. Look for areas with iron staining or other signs of oxidation.
- Check for Tarnish. Fresh native silver is bright, but it quickly tarnishes to dull gray, black, or iridescent colors. Don't overlook tarnished specimens, as they can still be significant.
- Test for Malleability. Native silver is very soft, malleable, and ductile. A small piece can be easily cut with a knife or bent without breaking. This distinguishes it from brittle sulfide minerals.
- Specific Gravity. Its high specific gravity (10.1-11.1) makes it feel noticeably heavy for its size, which can be a useful field indicator, especially for larger pieces.
Quick Check
- Color:
- Silver-white (fresh), tarnishes to gray/black/iridescent
- Luster:
- Bright metallic
- Streak:
- Silver-white, shiny
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