Minerals

Ophirite

Ca2Mg4[Zn2Mn3+2(H2O)2(Fe3+W9O34)2]·46H2O

Oppenheimerite

Na2(UO2)(SO4)2·3H2O

Orcelite

Ni5-xAs2 (x = 0.25)

Ordoñezite

ZnSb5+2O6

Örebroite

Mn2+6(Sb5+Fe3+)(SiO4)2O6

Oregonite

FeNi2As2

Oreillyite

Cr2N

Organovaite-Mn

K2MnNb4(Si4O12)2O4·5-7H2O

Organovaite-Zn

K2Zn(Nb,Ti)4(Si4O12)2(O,OH)4·6H2O

Orickite

CuFeS2·nH2O

Orientite

Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10·4H2O

Orishchinite

Ni2P

Orlandiite

Pb3Cl4(Se4+O3)·H2O

Orlovite

KLi2Ti(Si4O10)(OF)

Orlymanite

Ca4Mn2+3Si8O20(OH)6·2H2O

Orpiment

As2S3

Orschallite

Ca3(S4+O3)2(SO4)·12H2O

Orthobrannerite

U4+U6+Ti4O12(OH)2

Orthoclase

K(AlSi3O8)

Orthocuproplatinum

Pt3Cu

Orthogersdorffite

NiAsS

Orthojoaquinite-(Ce)

NaBa2Fe2+Ce2Ti2(SiO3)8O2(O,OH)·H2O

Orthojoaquinite-(La)

NaBa2Fe2+La2Ti2(SiO3)8O2(OH,O,F)·H2O

Orthominasragrite

V4+O(SO4)·5H2O

Orthopinakiolite

Mg2Mn3+O2(BO3)

Orthoserpierite

CaCu4(SO4)2(OH)6·3H2O

Orthowalpurgite

(UO2)Bi4O4(AsO4)2·2H2O

Osakaite

Zn4(SO4)(OH)6·5H2O

Osarizawaite

Pb(Al2Cu2+)(SO4)2(OH)6

Osarsite

OsAsS

Osbornite

TiN

Oscarkempffite

Ag10Pb4(Sb17Bi9)S48

Oskarssonite

AlF3

Osmium

Os

Osumilite

KFe2(Al5Si10)O30

Osumilite-(Mg)

KMg2Al3(Al2Si10)O30

Oswaldpeetersite

(UO2)2(CO3)(OH)2·4H2O

Otavite

Cd(CO3)

Otjisumeite

PbGe4O9

Ottemannite

Sn2S3

Ottensite

Na3(Sb2O3)3(SbS3)·3H2O

Ottohahnite

Na6(UO2)2(SO4)5(H2O)7·1.5H2O

Ottoite

Pb2TeO5

Ottrélite

Mn2+Al2O(SiO4)(OH)2

Otwayite

Ni2(CO3)(OH)2·H2O

Oulankaite

Pd5Cu4SnTe2S2

Ourayite

Ag3Pb4Bi5S13

Oursinite

Co(UO2)2(SiO3OH)2·6H2O