How to identify Native Silver

To correctly identify Native Silver (Silver (Ag)), check each of these features in order. Many rocks and minerals look alike, so cross-reference multiple properties before deciding.

Step-by-step identification

1. 1

   Color

   Overall color and any zoning or banding

   Bright silver-white when fresh, tarnishing to gray, black, or iridescent colors (yellow, brown, blue) upon exposure to air and sulfur compounds.

2. 2

   Luster

   How the surface reflects light: metallic, vitreous, dull

   Bright metallic.

3. 3

   Texture

   Grain size and surface feel: coarse, fine, glassy

   Often found in dendritic, arborescent, wire-like, or massive forms. Crystals are rare but can be cubic, octahedral, or dodecahedral.

4. 4

   Crystal Form

   Shape of visible crystals or crystal faces

   Isometric system. Commonly occurs as distorted crystals, wires, dendrites, plates, or massive aggregates. Well-formed crystals are typically cubes, octahedra, or dodecahedra.

5. 5

   Cleavage

   How it breaks: flat cleavage planes vs irregular fracture

   None. It exhibits a hackly fracture.

6. 6

   Geological Environment

   The rock formation and setting where it occurs

   Hydrothermal veins (epithermal to mesothermal), often associated with sulfide minerals (galena, sphalerite, chalcopyrite, argentite, pyrargyrite, proustite), carbonates (calcite, dolomite), and quartz. Also found in the oxidized zones of silver-bearing ore deposits (supergene enrichment) and occasionally in placer deposits.

Key Facts

Hardness

2.5-3 on the Mohs scale

Specific Gravity

10.1-11.1 (very heavy)

Crystal System

Isometric

Color

Silver-white, tarnishes to gray, black, or iridescent

Luster

Metallic

Transparency

Opaque

Fracture

Hackly

Cleavage

None

Composition

Elemental silver (Ag), often with minor amounts of gold (Au), copper (Cu), or mercury (Hg).

Physical characteristics

• Crystal Habit: Dendritic, arborescent, wire-like, massive, lamellar, rarely as distinct isometric crystals (cubes, octahedra, dodecahedra).
• Cleavage Type: None
• Fracture Type: Hackly (jagged, sharp, and irregular fracture typical of malleable metals)
• Tenacity: Malleable, ductile, sectile
• Luster Type: Metallic

Explore Native Silver