Rock Identifier
Gold-bearing placer gravel (possible gold flakes) (Unconsolidated alluvial sediment containing quartz, lithic fragments, and possibly native gold (Au)) — sedimentary
sedimentary

Gold-bearing placer gravel (possible gold flakes)

Unconsolidated alluvial sediment containing quartz, lithic fragments, and possibly native gold (Au)

AI-generated identification · may be incorrect

A mixture of sand and small rounded pebbles; pale yellow metallic-looking grains may be gold, but the photo alone cannot confirm them. Gold has Mohs hardness 2.5–3, metallic luster, cubic crystal structure, and high specific gravity (~19.3); gravel grains vary widely.

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Physical properties

A mixture of sand and small rounded pebbles; pale yellow metallic-looking grains may be gold, but the photo alone cannot confirm them. Gold has Mohs hardness 2.5–3, metallic luster, cubic crystal structure, and high specific gravity (~19.3); gravel grains vary widely.

Formation & geological history

Likely sediment concentrated by water in a stream or placer deposit as dense minerals settle. The sediment may be geologically young, while any gold grains were eroded from much older source rocks.

Uses & applications

Placer gravel is processed for gold recovery; the other material is generally ordinary aggregate. Gold is used in jewelry, electronics, and investment.

Geological facts

Gold is malleable and unusually dense, so it tends to remain in a pan while lighter sediment washes away. The visible yellow specks could also be mica, pyrite, or other minerals.

Field identification & locations

The image shows panned or concentrated gravel, but no gold can be identified confidently from appearance alone. Near 35.7°N, 106.0°W, regional geology makes mineralized stream sediment plausible; test suspected gold for malleability and heft, or have it assessed professionally.