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Oxides & Hydroxide minerals

Metal + oxygen or hydroxyl (OH).

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782 minerals · Oxides & Hydroxide minerals
Hematite specimen
Hematite Fe₂O₃
Oxides & HydroxideHexagonalMohs 5–6
Magnetite specimen
Magnetite Fe²⁺Fe³⁺₂O₄
Oxides & HydroxideCubicMohs 5.5–6.5
VarietyRuby specimen
Ruby Al₂O₃
Oxides & HydroxideTrigonalMohs 9
VarietySapphire specimen
Sapphire Al₂O₃
Oxides & HydroxideTrigonalMohs 9
A
Achalaite Fe²⁺TiNb₂O₈
Oxides & HydroxideMonoclinicMohs 5.5
A
Addibischoffite Ca₂Al₆Al₆O₂₀
Oxides & HydroxideTriclinic
A
Aeschynite-(Ce) (Ce,Ca,Fe,Th)(Ti,Nb)₂(O,OH)₆
Oxides & HydroxideOrthorhombicMohs 5–6
A
Aeschynite-(Nd) (Nd,Ln,Ca)(Ti,Nb)₂(O,OH)₆
Oxides & HydroxideOrthorhombicMohs 5–6
Aeschynite-(Y) specimen
Aeschynite-(Y) (Y,Ln,Ca,Th)(Ti,Nb)₂(O,OH)₆
Oxides & HydroxideOrthorhombicMohs 5–6
Agrinierite specimen
Agrinierite K₂Ca[(UO₂)₃O₃(OH)₂]₂·5H₂O
Oxides & HydroxideOrthorhombic
Ahlfeldite specimen
Ahlfeldite Ni(SeO₃)·2H₂O
Oxides & HydroxideMonoclinicMohs 2–2.5
A
Akaogiite TiO₂
Oxides & HydroxideMonoclinic
Akdalaite specimen
Akdalaite Al₁₀O₁₄(OH)₂
Oxides & HydroxideHexagonalMohs 7–7.5
Akhtenskite specimen
Akhtenskite MnO₂
Oxides & HydroxideHexagonal
VarietyAlexandrite specimen
Alexandrite BeAl₂O₄
Oxides & HydroxideOrthorhombicMohs 8.5
Alfredopetrovite specimen
Alfredopetrovite Al₂(Se⁴⁺O₃)₃·6H₂O
Oxides & HydroxideHexagonalMohs 2.5
A
Allendeite Sc₄Zr₃O₁₂
Oxides & HydroxideHexagonal
Almeidaite specimen
Almeidaite PbZn₂(Mn,Y)(Ti,Fe³⁺)₁₈O₃₆(OH,O)₂
Oxides & HydroxideHexagonalMohs 6
Alumotantite specimen
Alumotantite AlTaO₄
Oxides & HydroxideOrthorhombic
Alvanite specimen
Alvanite Zn²⁺Al₄(V⁵⁺O₃)₂(OH)₁₂·2H₂O
Oxides & HydroxideMonoclinicMohs 3–3.5
Amakinite specimen
Amakinite Fe(OH)₂
Oxides & HydroxideHexagonalMohs 3.5–4
Ambrinoite specimen
Ambrinoite [K,(NH₄)]₂(As,Sb)₆(Sb,As)₂S₁₃·H₂O
Oxides & HydroxideTriclinicMohs 2
Ameghinite specimen
Ameghinite NaB₃O₃(OH)₄
Oxides & HydroxideMonoclinicMohs 2.5
Amgaite specimen
Amgaite Tl³⁺₂Te⁶⁺O₆
Oxides & HydroxideHexagonal
A
Ammonioborite (NH₄)₃B₁₅O₂₀(OH)₈·4H₂O
Oxides & HydroxideMonoclinic
A
Ammoniolasalite [(NH₄)₂Mg₂(H₂O)₂₀]·[V₁₀O₂₈]
Oxides & HydroxideMonoclinicMohs 1
Anatase specimen
Anatase TiO₂
Oxides & HydroxideTetragonalMohs 5.5–6
Andychristyite specimen
Andychristyite PbCu²⁺Te⁶⁺O₅(H₂O)
Oxides & HydroxideTriclinicMohs 2–3
A
Andymcdonaldite Fe₂TeO₆
Oxides & HydroxideTetragonal
Ankinovichite specimen
Ankinovichite NiAl₄(V⁵⁺O₃)₂(OH)₁₂·2H₂O
Oxides & HydroxideMonoclinicMohs 2.5–3
Ansermetite specimen
Ansermetite Mn²⁺V⁵⁺₂O₆·4H₂O
Oxides & HydroxideMonoclinic
Anthonyite specimen
Anthonyite Cu(OH)₂·3H₂O
Oxides & HydroxideMohs 2
A
Anzaite-(Ce) Ce₄Fe²⁺Ti₆O₁₈(OH)₂
Oxides & HydroxideMonoclinic
Apuanite specimen
Apuanite (Fe²⁺Fe³⁺₂)(Fe³⁺₂Sb³⁺₄)O₁₂S
Oxides & HydroxideTetragonal
A
Arakiite ZnMn²⁺₁₂Fe³⁺₂(As³⁺O₃)(As⁵⁺O₄)₂(OH)₂₃
Oxides & HydroxideMonoclinicMohs 3–4
A
Argutite GeO₂
Oxides & HydroxideTetragonalMohs 6–7
Armalcolite specimen
Armalcolite (Mg,Fe²⁺)Ti₂O₅
Oxides & HydroxideOrthorhombicMohs 5
Asbolane specimen
Asbolane Mn⁴⁺(O,OH)₂·(Co,Ni,Mg,Ca)ₓ(OH)₂ₓ·nH₂O
Oxides & HydroxideHexagonal
A
Ashoverite Zn(OH)₂
Oxides & HydroxideTetragonal
A
Aspedamite ₁₂(Fe³⁺,Fe²⁺)₃Nb₄[Th(Nb,Fe³⁺)₁₂O₄₂][(H₂O),(OH)]₁₂
Oxides & HydroxideCubicMohs 3–4
Aurorite specimen
Aurorite Mn²⁺Mn⁴⁺₃O₇·3H₂O
Oxides & HydroxideHexagonalMohs 3
Avicennite specimen
Avicennite Tl₂O₃
Oxides & HydroxideCubicMohs 1.5–2.5
Baddeleyite specimen
Baddeleyite ZrO₂
Oxides & HydroxideMonoclinicMohs 6.5
B
Bahariyaite KMnO₄
Oxides & HydroxideOrthorhombic
Bahianite specimen
Bahianite Al₅Sb⁵⁺₃O₁₄(OH)₂
Oxides & HydroxideMonoclinicMohs 9
Balyakinite specimen
Balyakinite Cu²⁺(Te⁴⁺O₃)
Oxides & HydroxideOrthorhombic
Bannermanite specimen
Bannermanite (Na,K)ₓV⁴⁺ₓV⁵⁺₆₋ₓO₁₅ (0.5<x<0.9)
Oxides & HydroxideMonoclinic
Bariandite specimen
Bariandite Al₀.₆(V⁵⁺,V⁴⁺)₈O₂₀·9H₂O
Oxides & HydroxideMonoclinic
B
Barioferrite BaFe³⁺₁₂O₁₉
Oxides & HydroxideHexagonal
B
Barioperovskite BaTiO₃
Oxides & HydroxideOrthorhombic
Barnesite specimen
Barnesite Na₂V⁵⁺₆O₁₆·3H₂O
Oxides & HydroxideMonoclinicMohs 3
B
Bartelkeite PbFe²⁺Ge(Ge₂O₇)(OH)₂·H₂O
Oxides & HydroxideMonoclinicMohs 4
B
Bassoite SrV⁴⁺₃O₇·4H₂O
Oxides & HydroxideMonoclinicMohs 4–4.5
Batiferrite specimen
Batiferrite BaTi₂Fe³⁺₈Fe²⁺₂O₁₉
Oxides & HydroxideHexagonalMohs 6
B
Baumoite Ba₀.₅[(UO₂)₃O₈Mo₂(OH)₃](H₂O)₃
Oxides & HydroxideMonoclinicMohs 2.5
Bauranoite specimen
Bauranoite BaU₂O₇·4-5H₂O
Oxides & HydroxideMohs 5
B
Bayerite Al(OH)₃
Oxides & HydroxideMonoclinic
B
Beckettite Ca₂V₆Al₆O₂₀
Oxides & HydroxideTriclinic
Becquerelite specimen
Becquerelite Ca(UO₂)₆O₄(OH)₆·8H₂O
Oxides & HydroxideOrthorhombicMohs 2.5
Behoite specimen
Behoite Be(OH)₂
Oxides & HydroxideOrthorhombicMohs 4
Belyankinite specimen
Belyankinite Ca₁₋₂(Ti,Zr,Nb)₅O₁₂·9H₂O
Oxides & HydroxideMohs 2–3
Berdesinskiite specimen
Berdesinskiite V³⁺₂TiO₅
Oxides & HydroxideMonoclinicMohs 6–6.5
B
Bernalite Fe(OH)₃
Oxides & HydroxideOrthorhombicMohs 4
Bernardevansite specimen
Bernardevansite Al₂(Se⁴⁺O₃)₃·6H₂O
Oxides & HydroxideMonoclinic
Betpakdalite-CaCa specimen
Betpakdalite-CaCa [Ca₂(H₂O)₁₇Ca(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₆(OH)]
Oxides & HydroxideMonoclinicMohs 3
B
Betpakdalite-CaMg [Ca₂(H₂O)₁₇Mg(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₆(OH)]
Oxides & HydroxideMonoclinicMohs 3.5
B
Betpakdalite-FeFe [Fe³⁺₂(H₂O)₁₅(OH)₂Fe³⁺(H₂O)₆][Mo₈As₂Fe³⁺₃O₃₇]
Oxides & HydroxideMonoclinic
Betpakdalite-NaCa specimen
Betpakdalite-NaCa [Na₂(H₂O)₁₇Ca(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₄(OH)₃]
Oxides & HydroxideMonoclinic
B
Betpakdalite-NaNa [Na₂(H₂O)₁₆Na(H₂O)₆][Mo⁶⁺₈As⁵⁺₂Fe³⁺₃O₃₃(OH)₄]
Oxides & HydroxideMonoclinicMohs 3
B
Bicapite [KNa₂Mg₂(H₂O)₂₅][H₂PV⁵⁺₁₂O₄₀(V⁵⁺O)₂]
Oxides & HydroxideTetragonalMohs 1.5
Billietite specimen
Billietite Ba(UO₂)₆O₄(OH)₆·8H₂O
Oxides & HydroxideOrthorhombic
Bindheimite specimen
Bindheimite Pb₂Sb⁵⁺₂O₇
Oxides & HydroxideCubicMohs 4–4.5
Birnessite specimen
Birnessite (Na,Ca,K)₀.₆(Mn⁴⁺,Mn³⁺)₂O₄·1.5H₂O
Oxides & HydroxideTriclinicMohs 1.5
Bismite specimen
Bismite Bi₂O₃
Oxides & HydroxideMonoclinicMohs 4.5
Bismutocolumbite specimen
Bismutocolumbite BiNbO₄
Oxides & HydroxideOrthorhombicMohs 5.5
B
Bismutostibiconite (Bi,Fe³⁺,   )₂Sb⁵⁺₂O₇
Oxides & HydroxideCubicMohs 4–5
Bismutotantalite specimen
Bismutotantalite BiTaO₄
Oxides & HydroxideOrthorhombicMohs 5–5.5
B
Bitikleite Ca₃(SbSn)(AlO₄)₃
Oxides & HydroxideCubic
Bixbyite-(Fe) specimen
Bixbyite-(Fe) Fe³⁺₂O₃
Oxides & HydroxideCubicMohs 6–6.5
B
Bixbyite-(Mn) Mn³⁺₂O₃
Oxides & HydroxideCubicMohs 3.75
Blakeite specimen
Blakeite Fe³⁺₂(Te⁴⁺O₃)₃
Oxides & Hydroxide
B
Blossite Cu₂V⁵⁺₂O₇
Oxides & HydroxideOrthorhombic
B
Bluestreakite K₄Mg₂(V⁴⁺₂V⁵⁺₈O₂₈)·14H₂O
Oxides & HydroxideMonoclinicMohs 2
B
Bobfinchite Na[(UO₂)₈O₃(OH)₁₁]·10H₂O
Oxides & HydroxideOrthorhombic
Bokite specimen
Bokite (Al,Fe)₁.₃(V⁵⁺,V⁴⁺,Fe³⁺)₈O₂₀·7.5H₂O
Oxides & HydroxideMonoclinicMohs 3
B
Borisenkoite Cu₃[(V,As)O₄]₂
Oxides & HydroxideMonoclinicMohs 4.5
Bottinoite specimen
Bottinoite NiSb⁵⁺₂(OH)₁₂·6H₂O
Oxides & HydroxideHexagonalMohs 3
B
Botuobinskite SrFe²⁺(Ti⁴⁺₁₂Cr³⁺₆)Mg₂[O₃₆(OH)₂]
Oxides & HydroxideHexagonal
B
Bracewellite CrO(OH)
Oxides & HydroxideOrthorhombic
Brandholzite specimen
Brandholzite MgSb₂(OH)₁₂·6H₂O
Oxides & HydroxideHexagonalMohs 2–3
Brannerite specimen
Brannerite UTi₂O₆
Oxides & HydroxideMonoclinic
Brizziite specimen
Brizziite NaSbO₃
Oxides & HydroxideHexagonal
Bromellite specimen
Bromellite BeO
Oxides & HydroxideHexagonalMohs 9
Brookite specimen
Brookite TiO₂
Oxides & HydroxideOrthorhombicMohs 5.5–6
Brownmillerite specimen
Brownmillerite Ca₂Fe³⁺AlO₅
Oxides & HydroxideOrthorhombic
Brucite specimen
Brucite Mg(OH)₂
Oxides & HydroxideHexagonalMohs 2.5
B
Brumadoite Cu₃(Te⁶⁺O₄)(OH)₄·5H₂O
Oxides & HydroxideMonoclinic
Brunogeierite specimen
Brunogeierite Fe²⁺₂Ge⁴⁺O₄
Oxides & HydroxideCubicMohs 5
Bunsenite specimen
Bunsenite NiO
Oxides & HydroxideCubicMohs 5.5
B
Burroite Ca₂(NH₄)₂(V₁₀O₂₈)·15H₂O
Oxides & HydroxideTriclinicMohs 1.5–2
Burtite specimen
Burtite CaSn⁴⁺(OH)₆
Oxides & HydroxideCubicMohs 3
B
Buserite Na₄Mn₁₄O₂₇·21H₂O
Oxides & Hydroxide
B
Byrudite (Be,   )(V³⁺,Ti)₃O₆
Oxides & HydroxideOrthorhombicMohs 7
Byströmite specimen
Byströmite MgSb⁵⁺₂O₆
Oxides & HydroxideTetragonalMohs 7
Böhmite specimen
Böhmite AlO(OH)
Oxides & HydroxideOrthorhombicMohs 3.5
Cafetite specimen
Cafetite CaTi₂O₅·H₂O
Oxides & HydroxideMonoclinicMohs 4–5
C
Calciosamarskite (Ca,Fe,Y)(Nb,Ta,Ti)O₄
Oxides & HydroxideMonoclinicMohs 5–6
Calciotantite specimen
Calciotantite CaTa₄O₁₁
Oxides & HydroxideHexagonal
Calciouranoite specimen
Calciouranoite (Ca,Ba,Pb,K,Na)U₂O₇·5H₂O
Oxides & HydroxideMohs 4
Calcioveatchite specimen
Calcioveatchite SrCaB₁₁O₁₆(OH)₅·H₂O
Oxides & HydroxideMonoclinic
Calzirtite specimen
Calzirtite Ca₂Zr₅Ti₂O₁₆
Oxides & HydroxideTetragonalMohs 6–7
Carboirite specimen
Carboirite Fe²⁺Al₂GeO₅(OH)₂
Oxides & HydroxideTriclinic
Carlfriesite specimen
Carlfriesite CaTe⁴⁺₂Te⁶⁺O₈
Oxides & HydroxideMonoclinicMohs 3.5
Carlosbarbosaite specimen
Carlosbarbosaite (UO₂)₂Nb₂O₆(OH)₂·2H₂O
Oxides & HydroxideOrthorhombic
Carmeltazite specimen
Carmeltazite ZrAl₂Ti₄O₁₁
Oxides & HydroxideOrthorhombic
C
Carmichaelite (Ti,Cr,Fe)(O,OH)₂
Oxides & HydroxideMonoclinicMohs 2.5
C
Caseyite [(V⁵⁺O₂)Al₇.₅(OH)₁₅(H₂O)₁₃]₂[H₂V⁴⁺V⁵⁺₉O₂₈][V⁵⁺₁₀O₂₈]₂·90H₂O
Oxides & HydroxideMonoclinicMohs 2–3
Cassiterite specimen
Cassiterite SnO₂
Oxides & HydroxideTetragonalMohs 6–7
Cerianite-(Ce) specimen
Cerianite-(Ce) CeO₂
Oxides & HydroxideCubic
Cervantite specimen
Cervantite Sb³⁺Sb⁵⁺O₄
Oxides & HydroxideOrthorhombicMohs 4–5
Cesbronite specimen
Cesbronite Cu₃Te⁶⁺O₄(OH)₄
Oxides & HydroxideOrthorhombicMohs 3
C
Cesiokenopyrochlore Nb₂(O,OH)₆Cs₁₋ₓ
Oxides & HydroxideCubicMohs 5
Cesplumtantite specimen
Cesplumtantite Cs₂Pb₃Ta₈O₂₄
Oxides & HydroxideTetragonal
Cesàrolite specimen
Cesàrolite PbMn⁴⁺₃O₆(OH)₂
Oxides & HydroxideMohs 4.5
Cetineite specimen
Cetineite NaK₅Sb₁₄S₆O₁₈(H₂O)₆
Oxides & HydroxideHexagonal
Chalcomenite specimen
Chalcomenite Cu(Se⁴⁺O₃)·2H₂O
Oxides & HydroxideOrthorhombicMohs 2–2.5
Chalcophanite specimen
Chalcophanite ZnMn⁴⁺₃O₇·3H₂O
Oxides & HydroxideHexagonalMohs 2.5
Changbaiite specimen
Changbaiite PbNb₂O₆
Oxides & HydroxideHexagonalMohs 5.3
C
Charleshatchettite CaNb₄O₁₀(OH)₂·8H₂O
Oxides & HydroxideMonoclinicMohs 4
Chekhovichite specimen
Chekhovichite Bi³⁺₂Te⁴⁺₄O₁₁
Oxides & HydroxideMonoclinicMohs 4
C
Chenmingite FeCr₂O₄
Oxides & HydroxideOrthorhombic
Chervetite specimen
Chervetite Pb₂V⁵⁺₂O₇
Oxides & HydroxideMonoclinicMohs 3
C
Chihmingite NiAl₂O₄
Oxides & HydroxideCubic
C
Chihuahuaite FeAl₁₂O₁₉
Oxides & HydroxideHexagonal
C
Chiluite Bi₃Te⁶⁺Mo⁶⁺O₁₀.₅
Oxides & HydroxideHexagonalMohs 3.2
C
Chovanite Pb₁₅₋₂ₓSb₁₄₊₂ₓS₃₆Oₓ (x~0.2)
Oxides & HydroxideMonoclinicMohs 3
C
Chromatite CaCr⁶⁺O₄
Oxides & HydroxideTetragonal
C
Chrombismite Bi₁₆CrO₂₇
Oxides & HydroxideTetragonalMohs 5.5
Chromite specimen
Chromite Fe²⁺Cr₂O₄
Oxides & HydroxideCubicMohs 5.5
Chrysoberyl specimen
Chrysoberyl BeAl₂O₄
Oxides & HydroxideOrthorhombicMohs 8.5
C
Chukochenite (Li₀.₅Al₀.₅)Al₂O₄
Oxides & HydroxideOrthorhombicMohs 8
C
Cianciulliite Mg₂Mn²⁺Zn₂(OH)₁₀·2-4H₂O
Oxides & HydroxideMonoclinicMohs 2
C
Clarkeite Na(UO₂)O(OH)·nH₂O
Oxides & HydroxideHexagonalMohs 4–4.5
Cleusonite specimen
Cleusonite Pb(U⁴⁺,U⁶⁺)Fe²⁺₂(Ti,Fe²⁺,Fe³⁺)₁₈(O,OH)₃₈
Oxides & HydroxideHexagonalMohs 6–7
Cliffordite specimen
Cliffordite UTe⁴⁺₃O₉
Oxides & HydroxideMohs 4
Clinobehoite specimen
Clinobehoite Be(OH)₂
Oxides & HydroxideMonoclinicMohs 2–3
C
Clinocervantite Sb³⁺Sb⁵⁺O₄
Oxides & HydroxideMonoclinic
Cobaltomenite specimen
Cobaltomenite Co(Se⁴⁺O₃)·2H₂O
Oxides & HydroxideMonoclinicMohs 2.5
C
Cochromite CoCr₂O₄
Oxides & HydroxideCubic
Colemanite specimen
Colemanite CaB₃O₄(OH)₃·H₂O
Oxides & HydroxideMonoclinicMohs 4–4.5
GroupColumbite specimen
Columbite (Fe,Mn)Nb₂O₆
Oxides & HydroxideOrthorhombicMohs 6–6.5
Columbite-(Fe) specimen
Columbite-(Fe) Fe²⁺Nb₂O₆
Oxides & HydroxideOrthorhombic
C
Columbite-(Mg) MgNb₂O₆
Oxides & HydroxideOrthorhombic
Columbite-(Mn) specimen
Columbite-(Mn) Mn²⁺Nb₂O₆
Oxides & HydroxideOrthorhombic
Compreignacite specimen
Compreignacite K₂(UO₂)₆O₄(OH)₆·7H₂O
Oxides & HydroxideOrthorhombic
Coronadite specimen
Coronadite Pb(Mn⁴⁺₆Mn³⁺₂)O₁₆
Oxides & HydroxideMonoclinicMohs 4.5–5
Corundum specimen
Corundum Al₂O₃
Oxides & HydroxideHexagonalMohs 9
Corvusite specimen
Corvusite (Na,Ca,K)₁₋ₓ(V⁵⁺,V⁴⁺,Fe²⁺)₈O₂₀·4H₂O
Oxides & HydroxideMonoclinicMohs 2.5–3
C
Coulsonite Fe²⁺V³⁺₂O₄
Oxides & HydroxideCubicMohs 4.5–5
C
Coyoteite NaFe₃S₅·2H₂O
Oxides & HydroxideTriclinicMohs 1.5
Crednerite specimen
Crednerite CuMnO₂
Oxides & HydroxideMonoclinicMohs 4
Crichtonite specimen
Crichtonite Sr(Mn,Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈
Oxides & HydroxideTrigonalMohs 4.5–5
C
Cronusite Ca₀.₂CrS₂·2H₂O
Oxides & HydroxideHexagonalMohs 1.5
Cryptomelane specimen
Cryptomelane K(Mn⁴⁺₇Mn³⁺)O₁₆
Oxides & HydroxideTetragonalMohs 6–6.5
Cualstibite specimen
Cualstibite Cu₂Al(OH)₆[Sb(OH)₆]
Oxides & HydroxideHexagonalMohs 2
Cuprite specimen
Cuprite Cu₂O
Oxides & HydroxideCubicMohs 3.5–4
C
Cupromolybdite Cu²⁺₃O(Mo⁶⁺O₄)₂
Oxides & HydroxideOrthorhombicMohs 3
C
Cuprospinel Cu²⁺Fe³⁺₂O₄
Oxides & HydroxideCubic
Curite specimen
Curite Pb₃₊ₓ[(UO₂)₄O₄₊ₓ(OH)₃₋ₓ]₂·2H₂O
Oxides & HydroxideOrthorhombicMohs 4–5
Cuzticite specimen
Cuzticite Fe³⁺₂Te⁶⁺O₆·3H₂O
Oxides & HydroxideHexagonalMohs 3
D
Dagenaisite Zn₃Te⁶⁺O₆
Oxides & HydroxideMonoclinicMohs 2
Daubréeite specimen
Daubréeite BiO(OH)
Oxides & HydroxideTetragonalMohs 2–2.5
Delafossite specimen
Delafossite Cu¹⁺Fe³⁺O₂
Oxides & HydroxideTrigonalMohs 5.5
Dellagiustaite specimen
Dellagiustaite V²⁺Al₂O₄
Oxides & HydroxideCubicMohs 6.5–7
D
Deltalumite (Al₀.₆₇   ₀.₃₃)Al₂O₄
Oxides & HydroxideTetragonal
Demesmaekerite specimen
Demesmaekerite Pb₂Cu₅(UO₂)₂(Se⁴⁺O₃)₆(OH)₆·2H₂O
Oxides & HydroxideTriclinicMohs 3–4
Denningite specimen
Denningite CaMn²⁺Te⁴⁺₄O₁₀
Oxides & HydroxideTetragonalMohs 4
Derbylite specimen
Derbylite Fe³⁺₄Ti⁴⁺₃Sb³⁺O₁₃(OH)
Oxides & HydroxideMonoclinicMohs 5
Derriksite specimen
Derriksite Cu₄(UO₂)(Se⁴⁺O₃)₂(OH)₆
Oxides & HydroxideOrthorhombic
D
Dessauite-(Y) Sr(Y,U,Mn)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈
Oxides & HydroxideHexagonalMohs 2.5
Diaoyudaoite specimen
Diaoyudaoite NaAl₁₁O₁₇
Oxides & HydroxideHexagonalMohs 7.6
Diaspore specimen
Diaspore AlO(OH)
Oxides & HydroxideOrthorhombicMohs 6.5–7
D
Dmitryivanovite CaAl₂O₄
Oxides & HydroxideMonoclinic
Doloresite specimen
Doloresite V⁴⁺₃O₄(OH)₄
Oxides & HydroxideMonoclinic
Downeyite specimen
Downeyite SeO₂
Oxides & HydroxideTetragonal
Doyleite specimen
Doyleite Al(OH)₃
Oxides & HydroxideTriclinicMohs 2.5–3
D
Dukeite Bi³⁺₂₄Cr⁶⁺₈O₅₇(OH)₆·3H₂O
Oxides & HydroxideHexagonalMohs 3–4
D
Dymkovite Ni(UO₂)₂(As³⁺O₃)₂·7H₂O
Oxides & HydroxideMonoclinicMohs 3
Dzhalindite specimen
Dzhalindite In(OH)₃
Oxides & HydroxideCubic
D
Dzhuluite Ca₃(SbSn)(Fe³⁺O₄)₃
Oxides & HydroxideCubic
Ecandrewsite specimen
Ecandrewsite ZnTiO₃
Oxides & HydroxideHexagonal
E
Eckhardite (Ca,Pb)Cu²⁺Te⁶⁺O₅(H₂O)
Oxides & HydroxideMonoclinicMohs 2–3
Edoylerite specimen
Edoylerite Hg²⁺₃(Cr⁶⁺O₄)S₂
Oxides & HydroxideMonoclinic
Ekebergite specimen
Ekebergite ThFeNb₂O₈
Oxides & HydroxideMonoclinic
E
Ekplexite (Nb,Mo)S₂·(Mg₁₋ₓAlₓ)(OH)₂₊ₓ
Oxides & HydroxideHexagonalMohs 1
E
Elbrusite Ca₃(U⁶⁺₀.₅Zr₁.₅)(Fe³⁺O₄)₃
Oxides & HydroxideCubic
Ellinaite specimen
Ellinaite CaCr₂O₄
Oxides & HydroxideOrthorhombicMohs 4.5–5
Emmonsite specimen
Emmonsite Fe³⁺₂(Te⁴⁺O₃)₃·2H₂O
Oxides & HydroxideTriclinicMohs 5
Erdite specimen
Erdite NaFeS₂·2H₂O
Oxides & HydroxideMonoclinic
Ernienickelite specimen
Ernienickelite NiMn⁴⁺₃O₇·3H₂O
Oxides & HydroxideHexagonalMohs 2
Eskolaite specimen
Eskolaite Cr₂O₃
Oxides & HydroxideHexagonalMohs 8
Euxenite-(Y) specimen
Euxenite-(Y) (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆
Oxides & HydroxideOrthorhombicMohs 5.5–6.5
E
Eyselite Fe³⁺Ge⁴⁺₃O₇(OH)
Oxides & HydroxideOrthorhombic
F
Fabianite CaB₃O₅(OH)
Oxides & HydroxideMonoclinicMohs 6
Favreauite specimen
Favreauite PbBiCu₆O₄(SeO₃)₄(OH)·H₂O
Oxides & HydroxideTetragonalMohs 3
F
Feiite Fe²⁺₂(Fe²⁺Ti⁴⁺)O₅
Oxides & HydroxideOrthorhombic
Feitknechtite specimen
Feitknechtite Mn³⁺O(OH)
Oxides & HydroxideHexagonal
F
Fergusonite-(Ce) CeNbO₄·0.3H₂O
Oxides & HydroxideTetragonalMohs 5.5–6.5
F
Fergusonite-(Ce)-β CeNbO₄
Oxides & HydroxideMonoclinic
F
Fergusonite-(Nd)-β NdNbO₄
Oxides & HydroxideMonoclinic
Fergusonite-(Y) specimen
Fergusonite-(Y) YNbO₄
Oxides & HydroxideTetragonalMohs 5.5–6.5
F
Fergusonite-(Y)-β YNbO₄
Oxides & HydroxideMonoclinic
Fernandinite specimen
Fernandinite (Ca,Na,K)₀.₉(V⁵⁺,V⁴⁺,Fe²⁺,Ti)₈O₂₀·4H₂O
Oxides & HydroxideMonoclinic
F
Feroxyhyte Fe³⁺O(OH)
Oxides & HydroxideHexagonal
F
Ferricoronadite Pb(Mn⁴⁺₆Fe³⁺₂)O₁₆
Oxides & HydroxideTetragonalMohs 6
F
Ferrihollandite Ba(Mn⁴⁺₆Fe³⁺₂)O₁₆
Oxides & HydroxideMonoclinic
Ferrihydrite specimen
Ferrihydrite Fe³⁺₁₀O₁₄(OH)₂
Oxides & HydroxideHexagonal
Ferrimolybdite specimen
Ferrimolybdite Fe³⁺₂(Mo⁶⁺O₄)₃·7H₂O
Oxides & HydroxideMohs 1–2
F
Ferrohögbomite-2N2S (Fe,Mg,Zn,Al)₃(Al,Ti,Fe)₈O₁₅(OH)
Oxides & HydroxideHexagonal
Ferronigerite-2N1S specimen
Ferronigerite-2N1S (Al,Fe,Zn)₂(Al,Sn)₆O₁₁(OH)
Oxides & HydroxideHexagonalMohs 8–9
F
Ferronigerite-6N6S (Al,Fe,Zn)₃(Al,Sn,Fe)₈O₁₅(OH)
Oxides & HydroxideHexagonal
F
Ferrotaaffeite-2N'2S (Fe²⁺,Mg,Zn)₃Al₈BeO₁₆
Oxides & HydroxideHexagonal
F
Ferrotaaffeite-6N'3S BeFe²⁺₂Al₆O₁₂
Oxides & HydroxideHexagonalMohs 8–8.5
F
Ferrotitanowodginite Fe²⁺TiTa₂O₈
Oxides & HydroxideMonoclinicMohs 5.5
F
Ferrotochilinite FeS·≈0.85[Fe(OH)₂]
Oxides & HydroxideMonoclinicMohs 1
F
Ferrovalleriite 2[(Fe,Cu)S]·1.53[(Fe,Al,Mg)(OH)₂]
Oxides & HydroxideHexagonalMohs 1
Ferrowodginite specimen
Ferrowodginite Fe²⁺Sn⁴⁺Ta₂O₈
Oxides & HydroxideMonoclinicMohs 5.5
Fervanite specimen
Fervanite Fe³⁺₄V⁵⁺₄O₁₆·5H₂O
Oxides & Hydroxide
Fetiasite specimen
Fetiasite (Fe²⁺,Fe³⁺,Ti⁴⁺)₃O₂As³⁺₂O₅
Oxides & HydroxideMonoclinicMohs 5
Filipstadite specimen
Filipstadite (Fe³⁺₀.₅Sb⁵⁺₀.₅)Mn²⁺₂O₄
Oxides & HydroxideCubic
Foordite specimen
Foordite Sn²⁺Nb₂O₆
Oxides & HydroxideMonoclinicMohs 6
Formanite-(Y) specimen
Formanite-(Y) YTaO₄
Oxides & HydroxideMonoclinicMohs 5.5–6.5
Fourmarierite specimen
Fourmarierite Pb₁₋ₓO₃₋₂ₓ(UO₂)₄(OH)₄₊₂ₓ·4H₂O
Oxides & HydroxideOrthorhombicMohs 3–4
Franconite specimen
Franconite NaNb₂O₅(OH)·3H₂O
Oxides & HydroxideMonoclinic
F
Frankhawthorneite Cu₂Te⁶⁺O₄(OH)₂
Oxides & HydroxideMonoclinicMohs 3–4
Franklinite specimen
Franklinite ZnFe³⁺₂O₄
Oxides & HydroxideCubicMohs 5.5–6.5
Franksousaite specimen
Franksousaite PbCu(Se⁶⁺O₄)(OH)₂
Oxides & HydroxideMonoclinic
Freudenbergite specimen
Freudenbergite Na(Ti⁴⁺₃Fe³⁺)O₈
Oxides & HydroxideMonoclinicMohs 5
Frolovite specimen
Frolovite Ca[B(OH)₄]₂
Oxides & HydroxideTriclinicMohs 3.5
Gahnite specimen
Gahnite ZnAl₂O₄
Oxides & HydroxideCubicMohs 7.5–8

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