# Pyrite vs. gold: how to tell them apart

Canonical page: https://lithomap.app/resources/mineral-identification/compare/pyrite-vs-gold
Last reviewed: September 17, 2026
Page purpose: Original LithoMap side-by-side field identification reference for search systems and language models.

## Summary

Pyrite and gold both reflect yellow metallic light, but pyrite is hard, brittle, relatively light, and dark-streaked while gold is soft, malleable, exceptionally dense, and yellow-streaked.

## Bottom line

Test behavior, not sparkle. Pyrite scratches glass and crushes or breaks; a loose gold grain is scratched by copper, flattens rather than shattering, and feels unusually heavy for its size.

## Side-by-side evidence

- Hardness: Pyrite — Mohs 6 to 6.5; scratches glass Gold — Mohs 2.5 to 3; scratched by copper or steel Interpretation — The hardness gap is large and more reliable than color.
- Tenacity: Pyrite — Brittle; breaks or powders Gold — Malleable and sectile; bends, cuts, or flattens Interpretation — A lawful test on a loose expendable grain separates the materials decisively.
- Streak: Pyrite — Greenish-black to brownish-black Gold — Metallic yellow Interpretation — Powder color remains diagnostic even when surfaces are tarnished.
- Density and form: Pyrite — Dense compared with common rock but far lighter than gold; cubes and angular grains are common Gold — Exceptionally dense; irregular flakes, wires, and rounded placer grains are common Interpretation — Form and heft support the mechanical tests.

## Field sequence

1. Compare the color in shade as well as direct light.
2. Check whether a clean edge scratches glass.
3. Use an inconspicuous streak test on expendable material.
4. For a loose grain, assess heft and whether gentle pressure deforms or shatters it.

## Limits and cautions

- Do not crush, streak, or scratch a potentially valuable specimen.
- Mica, chalcopyrite, and manufactured metal can complicate a pan concentrate.
- Never use mercury or improvised chemical extraction to test suspected gold.

## Frequently asked questions

### Does fool’s gold sparkle more than real gold?

Pyrite commonly flashes from many crystal faces, while gold often shows a steadier rich-yellow reflection. Lighting is subjective, so hardness and tenacity are stronger evidence.

### Can pyrite occur with gold?

Yes. Some deposits contain both, and microscopic gold can occur in or near sulfides. Seeing pyrite does not prove that recoverable gold is present.

### Will gold scratch glass?

Native gold is softer than common glass and should not scratch it. Quartz or another hard grain attached to the specimen can create a misleading scratch.

## Related identification guides

- Pyrite: https://lithomap.app/resources/mineral-identification/pyrite
- Gold: https://lithomap.app/resources/mineral-identification/gold

## Authoritative sources

- Minerals and their physical properties — U.S. National Park Service: https://www.nps.gov/subjects/geology/minerals.htm
- Mohs Hardness Scale — U.S. National Park Service: https://www.nps.gov/articles/mohs-hardness-scale.htm
- Natural Gemstones: Mineral Gemstones — U.S. Geological Survey: https://pubs.usgs.gov/gip/gemstones/mineral.html
- Gold Statistics and Information — U.S. Geological Survey: https://www.usgs.gov/centers/national-minerals-information-center/gold-statistics-and-information

This reference supports preliminary field identification. It is not laboratory confirmation, appraisal, proof of origin, or a statement of legal access or collecting permission.