Rock Identifier
Native gold nugget or flake (Native gold (Au), possibly with minor silver/electrum) — mineral
mineral

Native gold nugget or flake

Native gold (Au), possibly with minor silver/electrum

AI-generated identification · may be incorrect

Tiny irregular metallic yellow-gold specimen with bright metallic luster; gold is very soft (Mohs 2.5–3), highly malleable, ductile, and dense (specific gravity about 19.3). Crystal form is rarely visible in natural nuggets; cleavage is absent.

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Physical properties

Tiny irregular metallic yellow-gold specimen with bright metallic luster; gold is very soft (Mohs 2.5–3), highly malleable, ductile, and dense (specific gravity about 19.3). Crystal form is rarely visible in natural nuggets; cleavage is absent.

Formation & geological history

Forms hydrothermally in quartz veins and as placer gold released by weathering and concentrated in stream sediments. Most natural gold spans broad geological ages, commonly Precambrian to younger hydrothermal deposits.

Uses & applications

Used primarily in jewelry, electronics, dentistry, and investment; small natural nuggets are collected as mineral specimens. Value depends mainly on mass and purity.

Geological facts

The image appears consistent with native gold, but its extremely small size and uncertain context prevent confirmation; brass-colored pyrite or gold-colored metal are possible alternatives.

Field identification & locations

Field tests include a streak test (gold leaves a yellow streak), malleability rather than brittle fracture, and very high density; avoid destructive testing on a tiny specimen. Common sources include Australia, Alaska, California, Canada, and South Africa.