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Gray minerals

Minerals whose typical color is gray.

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165 minerals · Gray minerals
VarietyAgate specimen
Agate SiO₂
SilicateTrigonalMohs 6.5–7
Baryte specimen
Baryte Ba(SO₄)
SulfateOrthorhombicMohs 3–3.5
Calcite specimen
Calcite Ca(CO₃)
CarbonateHexagonalMohs 3
GroupFeldspar specimen
Feldspar (K,Na,Ca)(Al,Si)₄O₈
SilicateTriclinicMohs 6–6.5
Galena specimen
Galena PbS
SulfideCubicMohs 2.5
Gypsum specimen
Gypsum Ca(SO₄)·2H₂O
SulfateMonoclinicMohs 2
Hematite specimen
Hematite Fe₂O₃
Oxides & HydroxideHexagonalMohs 5–6
VarietyLabradorite specimen
Labradorite (Ca,Na)(Al,Si)₄O₈
SilicateTriclinicMohs 6–6.5
GroupLepidolite specimen
Lepidolite K(Li,Al)₃(Si,Al)₄O₁₀(F,OH)₂
SilicateMonoclinicMohs 2.5–3
VarietyMoonstone specimen
Moonstone KAlSi₃O₈
SilicateMonoclinicMohs 6–6.5
Muscovite specimen
Muscovite KAl₂(Si₃Al)O₁₀(OH)₂
SilicateMonoclinicMohs 2–2.5
MineraloidObsidian specimen
Obsidian SiO₂-rich volcanic glass
SilicateAmorphousMohs 5–5.5
Opal specimen
Opal SiO₂·nH₂O
SilicateHexagonalMohs 5.5–6.5
FeaturedQuartz specimen
Quartz SiO₂
SilicateHexagonalMohs 7
VarietySmoky Quartz specimen
Smoky Quartz SiO₂
SilicateTrigonalMohs 7
Sodalite specimen
Sodalite Na₄(Si₃Al₃)O₁₂Cl
SilicateCubicMohs 5.5–6
Acanthite specimen
Acanthite Ag₂S
SulfideMonoclinicMohs 2–2.5
Albite specimen
Albite Na(AlSi₃O₈)
SilicateTriclinicMohs 6–6.5
Alunite specimen
Alunite KAl₃(SO₄)₂(OH)₆
SulfateHexagonalMohs 3.5–4
Andalusite specimen
Andalusite Al₂SiO₅
SilicateOrthorhombicMohs 6.5–7.5
VarietyAndesine specimen
Andesine (Ca,Na)(Al,Si)₄O₈
SilicateTriclinicMohs 6–6.5
Anglesite specimen
Anglesite Pb(SO₄)
SulfateOrthorhombicMohs 2.5–3
Anhydrite specimen
Anhydrite Ca(SO₄)
SulfateOrthorhombicMohs 3–3.5
Anorthite specimen
Anorthite Ca(Al₂Si₂O₈)
SilicateTriclinicMohs 6–6.5
Anthophyllite specimen
Anthophyllite Mg₂Mg₅Si₈O₂₂(OH)₂
SilicateOrthorhombicMohs 5.5–6
Antigorite specimen
Antigorite Mg₃Si₂O₅(OH)₄
SilicateMonoclinicMohs 2.5–3.5
Antimony specimen
Antimony Sb
Native ElementTrigonalMohs 3–3.5
Arsenic specimen
Arsenic As
Native ElementTrigonalMohs 3.5
Arsenopyrite specimen
Arsenopyrite FeAsS
SulfosaltMonoclinicMohs 5.5–6
Beidellite specimen
Beidellite (Na,Ca)₀.₃Al₂(Si,Al)₄O₁₀(OH)₂·nH₂O
SilicateMohs 1–2
Bismoclite specimen
Bismoclite BiOCl
HalideTetragonalMohs 2.5–3
Bismuth specimen
Bismuth Bi
Native ElementTrigonalMohs 2–2.5
Boracite specimen
Boracite Mg₃B₇O₁₃Cl
HalideOrthorhombicMohs 7–7.5
Borax specimen
Borax Na₂B₄O₅(OH)₄·8H₂O
BorateMonoclinicMohs 2–2.5
Boulangerite specimen
Boulangerite Pb₅Sb₄S₁₁
SulfosaltOrthorhombicMohs 2.5–3
Bournonite specimen
Bournonite CuPbSbS₃
SulfosaltOrthorhombicMohs 2.5–3
Brewsterite-Sr specimen
Brewsterite-Sr Sr(Al₂Si₆)O₁₆·5H₂O
SilicateMonoclinicMohs 4.5
Bustamite specimen
Bustamite Mn₂Ca₂MnCa(Si₃O₉)₂
SilicateTriclinicMohs 5.5–6.5
VarietyBytownite specimen
Bytownite (Ca,Na)(Al,Si)₄O₈
SilicateTriclinicMohs 6–6.5
Böhmite specimen
Böhmite AlO(OH)
Oxides & HydroxideOrthorhombicMohs 3.5
Cancrinite specimen
Cancrinite (Na,Ca,   )₈(Al₆Si₆)O₂₄(CO₃,SO₄)₂·2H₂O
SilicateHexagonalMohs 5–6
Cerussite specimen
Cerussite Pb(CO₃)
CarbonateOrthorhombicMohs 3–3.5
VarietyChalcedony specimen
Chalcedony SiO₂
SilicateTrigonalMohs 6.5–7
Chalcocite specimen
Chalcocite Cu₂S
SulfideMonoclinicMohs 2.5–3
Chamosite specimen
Chamosite (Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈
SilicateTriclinicMohs 2.5–3.5
RockChert specimen
Chert SiO₂ (cryptocrystalline)
SilicateTrigonalMohs 7
Chlorapatite specimen
Chlorapatite Ca₅(PO₄)₃Cl
PhosphateHexagonalMohs 5
Chlorargyrite specimen
Chlorargyrite AgCl
HalideCubicMohs 2.5
GroupChlorite specimen
Chlorite (Mg,Fe,Al)₆(Si,Al)₄O₁₀(OH)₈
SilicateMonoclinicMohs 2–2.5
Chloritoid specimen
Chloritoid Fe²⁺Al₂O(SiO₄)(OH)₂
SilicateTriclinicMohs 6.5
Chrysotile specimen
Chrysotile Mg₃Si₂O₅(OH)₄
SilicateMonoclinicMohs 2.5–3.5
Cobaltite specimen
Cobaltite CoAsS
SulfosaltOrthorhombicMohs 5.5
Colemanite specimen
Colemanite CaB₃O₄(OH)₃·H₂O
Oxides & HydroxideMonoclinicMohs 4–4.5
Cordierite specimen
Cordierite Mg₂Al₄Si₅O₁₈
SilicateOrthorhombicMohs 7–7.5
Corundum specimen
Corundum Al₂O₃
Oxides & HydroxideHexagonalMohs 9
Cryolite specimen
Cryolite Na₂NaAlF₆
HalideMonoclinicMohs 2.5–3
Cummingtonite specimen
Cummingtonite Mg₂Mg₅Si₈O₂₂(OH)₂
SilicateMonoclinicMohs 5–6
Diaspore specimen
Diaspore AlO(OH)
Oxides & HydroxideOrthorhombicMohs 6.5–7
Dolomite specimen
Dolomite CaMg(CO₃)₂
CarbonateHexagonalMohs 3.5–4
Enargite specimen
Enargite Cu₃AsS₄
SulfosaltOrthorhombicMohs 3
Enstatite specimen
Enstatite Mg₂Si₂O₆
SilicateOrthorhombicMohs 5–6
Erionite-Ca specimen
Erionite-Ca Ca₅[Si₂₆Al₁₀O₇₂]·30H₂O
SilicateHexagonalMohs 2–3
Erythrite specimen
Erythrite Co₃(AsO₄)₂·8H₂O
ArsenateMonoclinicMohs 1.5–2.5
RockFlint specimen
Flint SiO₂ (cryptocrystalline)
SilicateTrigonalMohs 7
Gedrite specimen
Gedrite Mg₂(Mg₃Al₂)(Si₆Al₂)O₂₂(OH)₂
SilicateOrthorhombicMohs 5.5–6
Gibbsite specimen
Gibbsite Al(OH)₃
Oxides & HydroxideMonoclinicMohs 2.5–3
Glauberite specimen
Glauberite Na₂Ca(SO₄)₂
SulfateMonoclinicMohs 2.5–3
Glaucophane specimen
Glaucophane Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂
SilicateMonoclinicMohs 6–6.5
Graphite specimen
Graphite C
Native ElementOrthorhombicMohs 1–2
Grunerite specimen
Grunerite Fe²⁺₂Fe²⁺₅Si₈O₂₂(OH)₂
SilicateMonoclinicMohs 5–6
Halloysite-7Å specimen
Halloysite-7Å Al₂Si₂O₅(OH)₄
SilicateMonoclinicMohs 2–2.5
Hardystonite specimen
Hardystonite Ca₂ZnSi₂O₇
SilicateTetragonalMohs 4
Howlite specimen
Howlite Ca₂SiB₅O₉(OH)₅
SilicateMonoclinicMohs 3.5
Hydroxylapatite specimen
Hydroxylapatite Ca₅(PO₄)₃OH
PhosphateHexagonalMohs 5
GroupIllite specimen
Illite K₀.₆₅Al₂(Al₀.₆₅Si₃.₃₅)O₁₀(OH)₂
SilicateMonoclinicMohs 1–2
Iron specimen
Iron Fe
Native ElementCubicMohs 4
Jamesonite specimen
Jamesonite Pb₄FeSb₆S₁₄
SulfosaltMonoclinicMohs 2–2.5
Kaolinite specimen
Kaolinite Al₂Si₂O₅(OH)₄
SilicateTriclinicMohs 2–2.5
Kernite specimen
Kernite Na₂B₄O₆(OH)₂·3H₂O
BorateMonoclinicMohs 2.5–3
Kieserite specimen
Kieserite Mg(SO₄)·H₂O
SulfateMonoclinicMohs 3.5
Kyanite specimen
Kyanite Al₂OSiO₄
SilicateTriclinicMohs 5.5–7
Langbeinite specimen
Langbeinite K₂Mg₂(SO₄)₃
SulfateCubicMohs 3.5
Lawsonite specimen
Lawsonite CaAl₂(Si₂O₇)(OH)₂·H₂O
SilicateOrthorhombicMohs 7–7.5
Lead specimen
Lead Pb
Native ElementCubicMohs 1.5
Leucite specimen
Leucite K(AlSi₂O₆)
SilicateTetragonalMohs 5.5–6
Magnesite specimen
Magnesite Mg(CO₃)
CarbonateHexagonalMohs 3.5–4.5
Manganite specimen
Manganite Mn³⁺O(OH)
Oxides & HydroxideMonoclinicMohs 4
Marcasite specimen
Marcasite FeS₂
SulfideOrthorhombicMohs 6–6.5
Margarite specimen
Margarite CaAl₂Si₂Al₂O₁₀(OH)₂
SilicateMonoclinicMohs 3.5–4.5
Marialite specimen
Marialite Na₄Al₃Si₉O₂₄Cl
SilicateTetragonalMohs 5.5–6
Meionite specimen
Meionite Ca₄Al₆Si₆O₂₄(CO₃)
SilicateTetragonalMohs 5.5–6
Melanotekite specimen
Melanotekite Pb₂Fe³⁺₂O₂(Si₂O₇)
SilicateOrthorhombicMohs 6.5
GroupMica specimen
Mica XY₂₋₃Z₄O₁₀(OH,F)₂
SilicateMonoclinicMohs 2–3
Microcline specimen
Microcline K(AlSi₃O₈)
SilicateTriclinicMohs 6–6.5
Molybdenite specimen
Molybdenite MoS₂
SulfideHexagonalMohs 1–1.5
Monticellite specimen
Monticellite CaMg(SiO₄)
SilicateOrthorhombicMohs 5.5
Montmorillonite specimen
Montmorillonite (Na,Ca)₀.₃(Al,Mg)₂Si₄O₁₀(OH)₂·nH₂O
SilicateMonoclinicMohs 1–2
Mullite specimen
Mullite Al₄₊₂ₓSi₂₋₂ₓO₁₀₋ₓ (x ≈ 0.4)
SilicateOrthorhombicMohs 6–7
Nepheline specimen
Nepheline Na₃K(Al₄Si₄O₁₆)
SilicateHexagonalMohs 5.5–6
VarietyNephrite specimen
Nephrite Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂
SilicateMonoclinicMohs 6–6.5
Nickeline specimen
Nickeline NiAs
SulfideHexagonalMohs 5–5.5
Niter specimen
Niter K(NO₃)
NitrateOrthorhombicMohs 2
Nitratine specimen
Nitratine Na(NO₃)
NitrateHexagonalMohs 1.5–2
Nosean specimen
Nosean Na₈(Si₆Al₆)O₂₄(SO₄)·H₂O
SilicateCubicMohs 5.5
VarietyOligoclase specimen
Oligoclase (Ca,Na)(Al,Si)₄O₈
SilicateTriclinicMohs 6–6.5
Olivenite specimen
Olivenite Cu₂(AsO₄)(OH)
ArsenateMonoclinicMohs 3
Orthoclase specimen
Orthoclase K(AlSi₃O₈)
SilicateMonoclinicMohs 6–6.5
Osumilite specimen
Osumilite KFe₂(Al₅Si₁₀)O₃₀
SilicateHexagonalMohs 5.5–6
Palygorskite specimen
Palygorskite (Mg,Al)₂Si₄O₁₀(OH)·4H₂O
SilicateMonoclinicMohs 2
MineraloidPearl specimen
Pearl Aragonite + conchiolin
CarbonateOrthorhombicMohs 2.5–4.5
Pectolite specimen
Pectolite NaCa₂Si₃O₈(OH)
SilicateTriclinicMohs 4.5–5
Petalite specimen
Petalite LiAlSi₄O₁₀
SilicateMonoclinicMohs 6–6.5
GroupPlagioclase specimen
Plagioclase (Na,Ca)(Al,Si)₄O₈
SilicateTriclinicMohs 6–6.5
Platinum specimen
Platinum Pt
Native ElementCubicMohs 4–4.5
Polyhalite specimen
Polyhalite K₂Ca₂Mg(SO₄)₄·2H₂O
SulfateTriclinicMohs 3.5
Powellite specimen
Powellite Ca(MoO₄)
MolybdateTetragonalMohs 3.5–4
RockPumice specimen
Pumice Vesicular volcanic glass
SilicateAmorphousMohs 5–6
Pyrargyrite specimen
Pyrargyrite Ag₃SbS₃
SulfosaltHexagonalMohs 2.5
Pyrolusite specimen
Pyrolusite MnO₂
Oxides & HydroxideTetragonalMohs 6–6.5
Pyrophyllite specimen
Pyrophyllite Al₂Si₄O₁₀(OH)₂
SilicateTriclinicMohs 1–1.5
Pyrrhotite specimen
Pyrrhotite Fe₇S₈
SulfideMonoclinicMohs 3.5–4.5
RockQuartzite specimen
Quartzite SiO₂ (metamorphic rock)
SilicateTrigonalMohs 7
Rhodizite specimen
Rhodizite KBe₄Al₄(B₁₁Be)O₂₈
Oxides & HydroxideCubicMohs 8
Romanèchite specimen
Romanèchite (Ba,H₂O)₂(Mn⁴⁺,Mn³⁺)₅O₁₀
Oxides & HydroxideMonoclinicMohs 5–6
Sanidine specimen
Sanidine K(AlSi₃O₈)
SilicateMonoclinicMohs 6–6.5
Saponite specimen
Saponite (Ca,Na)₀.₃(Mg,Fe)₃(Si,Al)₄O₁₀(OH)₂·4H₂O
SilicateMohs 1–2
GroupScapolite specimen
Scapolite Marialite–meionite series
SilicateTetragonalMohs 5.5–6
Scheelite specimen
Scheelite Ca(WO₄)
TungstateTetragonalMohs 4.5–5
Selenium specimen
Selenium Se
Native ElementHexagonalMohs 2
Sepiolite specimen
Sepiolite Mg₄Si₆O₁₅(OH)₂·6H₂O
SilicateOrthorhombicMohs 2–2.5
GroupSerpentine specimen
Serpentine (Mg,Fe)₃Si₂O₅(OH)₄
SilicateMonoclinicMohs 2.5–3.5
Siderite specimen
Siderite Fe(CO₃)
CarbonateHexagonalMohs 3.5–4.5
Sillimanite specimen
Sillimanite Al₂SiO₅
SilicateOrthorhombicMohs 6.5–7.5
Silver specimen
Silver Ag
Native ElementCubicMohs 2.5–3
Stephanite specimen
Stephanite Ag₅SbS₄
SulfosaltOrthorhombicMohs 2–2.5
Stibnite specimen
Stibnite Sb₂S₃
SulfideOrthorhombicMohs 2
Stishovite specimen
Stishovite SiO₂
SilicateTetragonalMohs 9–10
Stolzite specimen
Stolzite Pb(WO₄)
TungstateTetragonalMohs 2.5–3
Strontianite specimen
Strontianite Sr(CO₃)
CarbonateOrthorhombicMohs 3.5
Sylvite specimen
Sylvite KCl
HalideCubicMohs 2
Talc specimen
Talc Mg₃Si₄O₁₀(OH)₂
SilicateTriclinicMohs 1
Tellurium specimen
Tellurium Te
Native ElementHexagonalMohs 2–2.5
GroupTennantite specimen
Tennantite (Cu,Fe)₁₂As₄S₁₃
SulfosaltCubicMohs 3–4.5
Tennantite-(Fe) specimen
Tennantite-(Fe) Cu₆(Cu₄Fe₂)As₄S₁₃
SulfosaltCubicMohs 3–4.5
Tenorite specimen
Tenorite CuO
Oxides & HydroxideMonoclinicMohs 3.5
Tephroite specimen
Tephroite Mn²⁺₂(SiO₄)
SilicateOrthorhombicMohs 6
GroupTetrahedrite specimen
Tetrahedrite (Cu,Fe)₁₂Sb₄S₁₃
SulfosaltCubicMohs 3–4.5
Tetrahedrite-(Fe) specimen
Tetrahedrite-(Fe) Cu₆(Cu₄Fe₂)Sb₄S₁₃
SulfosaltMohs 3–4.5
Thortveitite specimen
Thortveitite Sc₂Si₂O₇
SilicateMonoclinicMohs 6–7
Thénardite specimen
Thénardite Na₂(SO₄)
SulfateOrthorhombicMohs 2.5–3
Tin specimen
Tin Sn
Native ElementTetragonalMohs 1.5–1.8
Tremolite specimen
Tremolite Ca₂(Mg₅.₀₋₄.₅Fe²⁺₀.₀₋₀.₅)Si₈O₂₂(OH)₂
SilicateMonoclinicMohs 5–6
Tridymite specimen
Tridymite SiO₂
SilicateMonoclinicMohs 7
Trilithionite specimen
Trilithionite KLi₁.₅Al₁.₅(Si₃Al)O₁₀F₂
SilicateMonoclinicMohs 2.5–3
Triphylite specimen
Triphylite LiFe²⁺(PO₄)
PhosphateOrthorhombicMohs 4–5
Uraninite specimen
Uraninite UO₂
Oxides & HydroxideCubicMohs 5–6
Wairakite specimen
Wairakite Ca(Si₄Al₂)O₁₂·2H₂O
SilicateMonoclinicMohs 4.5–5
Witherite specimen
Witherite Ba(CO₃)
CarbonateOrthorhombicMohs 3–3.5
Wollastonite specimen
Wollastonite CaSiO₃
SilicateTriclinicMohs 4.5–5
GroupXenotime specimen
Xenotime YPO₄
PhosphateTetragonalMohs 4–5
Xenotime-(Y) specimen
Xenotime-(Y) Y(PO₄)
PhosphateTetragonalMohs 4–5
Zinc specimen
Zinc Zn
Native ElementHexagonalMohs 2.5
GroupZinnwaldite specimen
Zinnwaldite KLiFe²⁺Al(AlSi₃)O₁₀(F,OH)₂
SilicateMonoclinicMohs 2.5–3
Zoisite specimen
Zoisite Ca₂Al₃[Si₂O₇][SiO₄]O(OH)
SilicateOrthorhombicMohs 6–7
Zunyite specimen
Zunyite Al₁₃Si₅O₂₀(OH,F)₁₈Cl
SilicateCubicMohs 7