LithoMap

Mineral identification comparison

Pyrite vs. gold: how to tell them apart

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.

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Brassy metallic pyrite crystal specimen
PyriteSulfide mineral · FeS₂Photo: Didier Descouens · CC BY-SA 4.0
Native gold specimen from Pontes e Lacerda, Brazil, displayed against a black background
GoldNative element · AuPhoto: Carlin J. Green, U.S. Geological Survey · Public domain
Quick answer

The most useful distinction

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

Pyrite and Gold comparison table

PropertyPyriteGoldHow to use it
HardnessMohs 6 to 6.5; scratches glassMohs 2.5 to 3; scratched by copper or steelThe hardness gap is large and more reliable than color.
TenacityBrittle; breaks or powdersMalleable and sectile; bends, cuts, or flattensA lawful test on a loose expendable grain separates the materials decisively.
StreakGreenish-black to brownish-blackMetallic yellowPowder color remains diagnostic even when surfaces are tarnished.
Density and formDense compared with common rock but far lighter than gold; cubes and angular grains are commonExceptionally dense; irregular flakes, wires, and rounded placer grains are commonForm and heft support the mechanical tests.
Field sequence

A practical identification sequence

  1. 1

    Compare the color in shade as well as direct light.

  2. 2

    Check whether a clean edge scratches glass.

  3. 3

    Use an inconspicuous streak test on expendable material.

  4. 4

    For a loose grain, assess heft and whether gentle pressure deforms or shatters it.

Limits and cautions

Where the distinction gets difficult

  • 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.

Use several independent observations. This comparison supports preliminary field identification, not laboratory confirmation, appraisal, proof of origin, or collecting permission.

Common questions

Pyrite vs. gold FAQ

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.

Source basis

Authoritative sources

LithoMap wrote this comparison in original language from the physical properties and geological concepts supported by these public scientific references.

Editorial review: September 17, 2026.

Resolve another lookalike

More mineral comparisons

All mineral guides
Side-by-side guideQuartz vs. calciteTest an inconspicuous fresh surface. Quartz scratches ordinary glass and breaks with curved or irregular fracture; calcite is scratched by a steel point, cleaves into slanted rhombs, and fizzes with dilute acid.Side-by-side guideQuartz vs. feldsparStudy how the grain ends. Quartz usually has curved or irregular broken surfaces with no repeated flat direction; feldspar commonly shows two recurring cleavage planes that meet near 90 degrees.Side-by-side guideMuscovite vs. biotiteFirst confirm mica by its elastic, peelable sheets. Then compare thin flakes rather than a thick book: pale, nearly colorless sheets favor muscovite; brown, green-brown, or black sheets favor biotite.Side-by-side guideHematite vs. magnetiteUse both a magnet and an unglazed streak plate. Strong attraction with a black streak favors magnetite; a red-brown streak with weak or absent attraction favors hematite.Side-by-side guideGypsum vs. calciteBegin with hardness. A fingernail scratch favors gypsum; material that resists a fingernail but scratches under a copper coin favors calcite. A clean calcite surface then fizzes readily with dilute acid.Side-by-side guideFluorite vs. quartzDo not use color. Quartz readily scratches glass and breaks without cleavage; fluorite is scratched by steel and commonly breaks into triangular-faced octahedral fragments along four cleavage directions.Side-by-side guidePyrite vs. chalcopyriteUse hardness and form together. Pyrite commonly scratches glass and preserves sharp striated cubes; chalcopyrite is readily scratched by steel and typically occurs as softer irregular grains or masses.Side-by-side guideQuartz vs. diamondDo not use a destructive scratch test on an unknown valuable crystal. Crystal form and geologic context can rule out many quartz specimens, but suspected diamond should be screened with appropriate gemological instruments.Side-by-side guideGypsum vs. talcBoth yield to a fingernail, so compare degree and feel. Talc scratches with almost no effort and often feels greasy; gypsum offers slightly more resistance and shows characteristic bladed, fibrous, or clear cleavage forms.Side-by-side guideCalcite vs. dolomiteUse a controlled acid test on expendable material. A clean calcite surface effervesces immediately; dolomite usually needs powdering to produce an obvious cold-acid reaction.Side-by-side guideGold vs. copperFind a natural fresh surface without damaging the specimen. Gold remains yellow and feels exceptionally heavy; copper is distinctly redder, less dense, and commonly associated with green or blue alteration minerals.Side-by-side guideSilver vs. galenaUse breakage behavior and cleavage, not shine. 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Lightweight material that marks readily and splits into flakes favors graphite; a very heavy blocky specimen with right-angle cleavage favors galena.Side-by-side guideApatite vs. fluoriteTest hardness and breakage. Apatite at Mohs 5 can scratch fluorite; fluorite at Mohs 4 develops repeated triangular octahedral cleavage faces.Side-by-side guideTopaz vs. quartzCleavage and crystal form are safer than scratch tests on good specimens. A flat repeated basal cleavage favors topaz; curved fracture and six-sided pyramidal crystals favor quartz.Side-by-side guideBeryl vs. quartzStudy the prism and termination. Flat-ended, longitudinally striated hexagonal prisms favor beryl; pyramidal points and conchoidal fracture favor quartz.Side-by-side guideTourmaline vs. garnetUse crystal shape rather than color. Long grooved prisms favor tourmaline; compact many-faced equant crystals favor garnet.Side-by-side guideKaolinite vs. talcUse feel and relative hardness cautiously. A greasy mass scratched effortlessly by a fingernail favors talc; dull earthy clay near Mohs 2 to 2.5 may be kaolinite but commonly needs X-ray diffraction for confirmation.Side-by-side guideHornblende vs. tourmalineCheck breakage and cross section. Repeated cleavage near 60 and 120 degrees favors hornblende; deep lengthwise grooves and a rounded-triangular section favor tourmaline.Side-by-side guideAugite vs. hornblendeMeasure the intersection of repeated cleavage surfaces. Near-right angles favor augite; distinctly oblique amphibole angles favor hornblende.Side-by-side guideSerpentine vs. malachiteUse streak and texture without generating dust. Green powder and concentric or botryoidal structure favor malachite; white streak and waxy, scaly, or fibrous material favor serpentine.Side-by-side guideChlorite vs. biotiteTest an already loose flake. 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Flat cleavable blades favor kyanite; compact crystals with extreme uniform hardness and no cleavage favor corundum.Side-by-side guideStaurolite vs. garnetUse crystal geometry. Stout prisms or natural cross twins favor staurolite; compact many-faced or rounded crystals favor garnet.Side-by-side guideGoethite vs. hematiteIgnore surface color and use streak. Ocher-yellow to yellow-brown powder favors goethite; distinctly red-brown powder favors hematite.Side-by-side guideRutile vs. hematiteStart with streak on expendable material. A pale brown or yellow-brown streak with hard striated prisms favors rutile; a distinct red-brown streak favors hematite.Side-by-side guideIlmenite vs. magnetiteCompare magnetic strength with a known magnet, then streak. Strong attraction and black powder favor magnetite; weak response with black to brownish-red powder may favor ilmenite.Side-by-side guideZircon vs. diamondDo not scratch a possible gem. 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