Gold Identification Guide

A field guide to identifying native gold and separating it from the pyrite, mica, and chalcopyrite that fool most beginners.

Read the full Gold encyclopedia entry →

What Gold Looks Like

Native gold is a metallic element with an unmistakable warm, buttery golden-yellow color that does not change in shade as you rotate it under light. It has a bright metallic luster and is opaque. In the field it almost never occurs as neat crystals; instead expect:

Flakes, flour, and dust in stream gravels (placer gold)
Nuggets — rounded, dented, water-worn lumps
Wires, dendrites, and leaf in quartz veins (lode gold)
Specks and stringers in white "bull" quartz

Pure gold is rich yellow; silver-bearing (electrum) gold is paler, almost whitish-yellow.

Step-by-Step Field ID Checklist

Check the color in shade. Real gold stays golden in shadow. Pyrite and mica look bright in direct sun but turn dark or gray in shade.
Test malleability. Press or poke a flake with a pin: gold dents and bends like soft metal. Pyrite shatters; mica flakes apart.
Feel the heft. Gold is extremely dense (SG ~19.3, lower if alloyed). A small nugget feels astonishingly heavy.
Scratch test for hardness. Gold is soft (Mohs 2.5–3); a steel pin scratches it. Pyrite (6–6.5) will not scratch.
Streak it. Gold leaves a shiny yellow streak. Pyrite leaves a greenish-black streak.

Key Diagnostic Tests

Hardness: 2.5–3 — soft, dents with a pin.
Specific gravity: up to 19.3 (this is why panning works; gold sinks).
Malleability: flattens and bends, never shatters — the single best test against pyrite.
Streak: golden-yellow and shiny.
No tarnish: gold stays bright; chalcopyrite tarnishes iridescent.
Non-magnetic and unreactive to acids (does not dissolve in single acids).

Common Look-Alikes ("Fool's Gold") and How to Tell Them Apart

Pyrite: brassy and pale yellow with cubic crystals; hard and brittle, shatters when poked, and looks dark in shade. Gold is soft, malleable, and stays yellow.
Chalcopyrite: deeper brassy gold that tarnishes to iridescent blue-purple; also brittle and much lighter than gold.
Biotite/phlogopite mica: glitters golden in sunlight but is in thin flexible sheets that flake apart and float — gold sinks.
Weathered (gossan) iron stains: can shine yellow-brown but smear as ochre powder; gold does not.

Where Gold Is Found

Lode gold occurs in quartz veins associated with sulfides in greenstone belts, slate belts, and along faults. Placer gold concentrates in the gravels of present and ancient streams, on bedrock crevices, behind boulders, and on the inside of river bends. Classic districts include the California Mother Lode, the Witwatersrand, Australia's Victoria goldfields, and Alaska's creeks.

Frequently asked questions

How can you tell if it's real gold or fool's gold?

Poke it with a pin. Real gold is soft and malleable, denting and bending without breaking, and stays golden-yellow even in shade. Pyrite (fool's gold) is hard and brittle, shatters into bits, and looks dark in shadow.

What does real gold look like in a rock?

In lode rock, gold appears as bright yellow specks, wires, or stringers embedded in white quartz, often near rusty iron staining. It keeps a constant rich yellow color from every angle.

Gold vs pyrite — what is the fastest test?

Hardness and malleability. Gold is Mohs 2.5–3 and bends; pyrite is 6–6.5 and shatters. Gold also leaves a yellow streak while pyrite leaves a greenish-black streak.

Why is gold so heavy?

Native gold has a specific gravity around 19.3, far denser than common minerals. This high density is exactly why gold settles to the bottom of a pan and concentrates on bedrock in streams.

Does gold tarnish or rust?

No. Gold is chemically inert, so it stays bright indefinitely and does not rust or tarnish. If your 'gold' shows an iridescent or blackened film, it is more likely chalcopyrite or pyrite.

Gold identified by the community

Recent Gold specimens identified with Rock Identifier.