Densest Minerals

20 minerals

Specific gravity (SG) compares a mineral's density to that of water. A mineral with SG 5.0 is five times denser than an equivalent volume of water. This simple ratio is one of the most useful identification tests because it can be estimated just by hefting a specimen — experienced collectors can feel the difference between quartz (SG 2.65) and galena (SG 7.6) instantly.

The densest minerals typically contain heavy elements such as lead, gold, platinum, tungsten, or uranium. Native gold (SG 19.3) and platinum (SG 21.5) are legendary for their heft, while sulfide and oxide minerals of lead, bismuth, and mercury also cluster at the high end. Crystal packing efficiency and atomic mass together determine where a mineral falls on the density spectrum.

Density data guides prospectors in panning and gravity separation, helps gemologists distinguish natural stones from simulants, and underpins industrial applications where mass per volume matters — from radiation shielding (galena) to ballast and counterweights (native metals).
How we ranked these

Ranked by maximum specific gravity value. Values from Mindat.org and the Handbook of Mineralogy. Only minerals with verified specific gravity data are included.

🥇 #1
Gold (Au)
Gold (Au)

Cubic (Isometric) · Metallic

Gold is a precious metal that has been valued since antiquity. It is extremely malleable and ductile, and is the most non-reactive of all metals. Native gold typically contains silver and sometimes co

SG 15.60-19.30 Mohs 2.5-3.0 Metallic
🥈 #2
Silver (Ag)
Silver (Ag)

Cubic (Isometric) · Metallic

Native silver occurs in hydrothermal veins, often associated with calcite, quartz, and other sulfide minerals. It is the best conductor of electricity and has been used for coinage and jewelry for mil

SG 10.10-10.50 Mohs 2.5-3.0 Metallic
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🥉 #3
Copper (Cu)
Copper (Cu)

Cubic (Isometric) · Metallic

Native copper was one of the first metals used by humans, with artifacts dating back over 10,000 years. It occurs in basaltic lava flows and sandstone deposits. The Keweenaw Peninsula in Michigan prod

SG 8.90 Mohs 2.5-3.0 Metallic
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  1. Cinnabar (HgS)
    Cinnabar (HgS)

    Trigonal · Adamantine

    Cinnabar é o principal minério de mercúrio e um dos minerais não metálicos mais densos. Sua impressionante cor escarlate o tornou um pigmento precioso (vermelhão) desde a antiguidade. Forma-se tipicam

    SG 8.10-8.20 Mohs 2.0-2.5 Adamantine
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  2. Galena (PbS)
    Galena (PbS)

    Cubic (Isometric) · Metallic

    Galena is the principal ore of lead and one of the most widely distributed sulfide minerals. It commonly occurs with sphalerite, calcite, and fluorite. Its perfect cubic cleavage and high specific gra

    SG 7.40-7.60 Mohs 2.5-2.8 Metallic
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  3. Wolframite ((Fe,Mn)WO4)
    Wolframite ((Fe,Mn)WO4)

    Monoclinic · Submetallic

    Wolframite é um mineral importante de minério de tungstênio que forma uma série entre ferberita (rica em ferro) e huebnerita (rica em manganês). O tungstênio derivado da wolframita é essencial para ap

    SG 7.00-7.50 Mohs 4.0-4.5 Submetallic
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  4. Cassiterite (SnO2)
    Cassiterite (SnO2)

    Tetragonal · Adamantine

    Cassiterite is the principal ore of tin and has been mined since the Bronze Age. It occurs primarily in high-temperature hydrothermal veins and placer deposits. Major sources include China, Indonesia,

    SG 6.80-7.10 Mohs 6.0-7.0 Adamantine
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  5. Hematite (Fe2O3)
    Hematite (Fe2O3)

    Trigonal · Metallic

    Hematite is the principal ore of iron and one of the most common iron minerals. Its name comes from the Greek word for blood, referring to the red color of its streak. Specular hematite has a brillian

    SG 5.00-5.30 Mohs 5.0-6.5 Metallic
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  6. Magnetite (Fe3O4)
    Magnetite (Fe3O4)

    Cubic (Isometric) · Metallic

    Magnetita é um dos minerais mais magnéticos de todos os minerais naturais e é a principal fonte de minério de ferro.

    SG 5.17-5.18 Mohs 5.5-6.5 Metallic
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  7. Pyrite (FeS2)
    Pyrite (FeS2)

    Cubic (Isometric) · Metallic

    Conhecida como 'ouro dos tolos', a pirita é o mineral sulfeto mais comum. Seu brilho metálico e cor amarelo-latão pálido lhe conferem uma semelhança superficial com o ouro. Ocorre em todos os tipos de

    SG 4.95-5.10 Mohs 6.0-6.5 Metallic
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  8. Zircon (ZrSiO4)
    Zircon (ZrSiO4)

    Tetragonal · Adamantine

    Zircon is the oldest mineral found on Earth, with some crystals dating back 4.4 billion years. It is an important accessory mineral in igneous rocks and a key mineral for geochronology (U-Pb dating).

    SG 3.93-4.73 Mohs 6.5-7.5 Adamantine
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  9. Barite (BaSO4)
    Barite (BaSO4)

    Orthorhombic · Vitreous

    Barite is notable for its high specific gravity (the heaviest of the common non-metallic minerals) and is the reference mineral for barium. It is primarily used as a weighting agent in drilling muds f

    SG 4.30-4.60 Mohs 3.0-3.5 Vitreous
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  10. Olivine ((Mg,Fe)2SiO4)
    Olivine ((Mg,Fe)2SiO4)

    Orthorhombic · Vitreous

    Olivina é um grupo de minerais silicatados comuns no manto terrestre e em rochas máficas e ultramáficas.

    SG 3.22-4.39 Mohs 6.5-7.0 Vitreous
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  11. Garnet (Almandine) (Fe3Al2(SiO4)3)
    Garnet (Almandine) (Fe3Al2(SiO4)3)

    Cubic (Isometric) · Vitreous

    grupo Almandine is the most common garnet species and a key metamorphic indicator mineral. The garnet group includes pyrope, grossular, andradite, spessartine, and uvarovite. Garnets are widely used a

    SG 3.93-4.32 Mohs 6.5-7.5 Vitreous
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  12. Chalcopyrite (CuFeS2)
    Chalcopyrite (CuFeS2)

    Tetragonal · Metallic

    Chalcopyrite is the most important copper ore mineral and occurs in virtually all sulfide deposits. It is often confused with pyrite but can be distinguished by its deeper yellow color, lower hardness

    SG 4.10-4.30 Mohs 3.5-4.0 Metallic
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  13. Rutile (TiO2)
    Rutile (TiO2)

    Tetragonal · Adamantine

    Rutile é a forma natural mais comum de dióxido de titânio e um minério importante de titânio. Seus cristais aciculares dourados inclusos em quartzo (quartzo rutilado) são apreciados como gemas. Também

    SG 4.18-4.25 Mohs 6.0-6.5 Adamantine
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  14. Corundum (Al2O3)
    Corundum (Al2O3)

    Trigonal · Adamantine

    Corundum is the second hardest natural mineral after diamond. Its gem varieties are ruby (red, colored by chromium) and sapphire (all other colors). Synthetic corundum is widely used as an abrasive an

    SG 3.98-4.10 Mohs 9.0 Adamantine
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  15. Sphalerite (ZnS)
    Sphalerite (ZnS)

    Cubic (Isometric) · Adamantine

    Sphalerite é o principal minério de zinco e um dos minerais sulfetos mais comuns. Seu nome vem do grego 'enganoso' porque era frequentemente confundida com a galena. A esfalerita pura é amarelo pálido

    SG 3.90-4.10 Mohs 3.5-4.0 Adamantine
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  16. Malachite (Cu2(CO3)(OH)2)
    Malachite (Cu2(CO3)(OH)2)

    Monoclinic · Vitreous

    Malaquita é um mineral vívido de carbonato de cobre verde usado como pigmento desde a antiguidade.

    SG 3.60-4.00 Mohs 3.5-4.0 Vitreous
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  17. Celestine (SrSO4)
    Celestine (SrSO4)

    Orthorhombic · Vitreous

    Celestine (celestite) is the primary ore of strontium, named for its occasional celestial blue color. The world's largest geode, the Crystal Cave in Put-in-Bay, Ohio, is lined with celestine crystals

    SG 3.95-3.97 Mohs 3.0-3.5 Vitreous
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Frequently Asked Questions

What is the densest mineral?
Native platinum has one of the highest specific gravities among common minerals at around 21.5, meaning it is 21.5 times denser than water. Native gold (SG 19.3) and iridium-osmium alloys are similarly dense due to their heavy atomic masses.
How is specific gravity used to identify minerals?
Specific gravity is one of the most reliable non-destructive identification tests. Experienced collectors can often identify minerals by heft alone. Hydrostatic weighing — comparing the weight in air versus water — gives precise SG values for definitive identification.
Why are some minerals so much denser than others?
Density depends on atomic mass and crystal packing efficiency. Minerals containing heavy elements like lead, gold, platinum, tungsten, or uranium have high SGs. Crystal structure also matters — tightly packed arrangements yield higher density than open frameworks.

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