Minerais

Okenite

Ca10Si18O46·18H2O

Okhotskite

Ca2Mn2+Mn3+2(Si2O7)(SiO4)(OH)2·H2O

Okieite

Mg3[V10O28]·28H2O

Okruginite

Cu2SnSe3

Okruschite

Ca2Mn2+5Be4(AsO4)6(OH)4·6H2O

Oldhamite

CaS

Oldsite-(K)

K2Fe2+[(UO2)(SO4)2]2(H2O)8

Olekminskite

Sr2(CO3)2

Olenite

NaAl3Al6(Si6O18)(BO3)3O3(OH)

Olgafrankite

Ni3Ge

Olgite

(Ba,Sr)(Na,Sr,REE)2Na(PO4)2

Olivenite

Cu2(AsO4)(OH)

Olkhonskite

Cr2Ti3O9

Olmiite

CaMn[SiO3(OH)](OH)

Olmsteadite

KFe2+2NbO2(PO4)2·2H2O

Olsacherite

Pb2(Se6+O4)(SO4)

Olshanskyite

Ca2[B3O3(OH)6]OH·3H2O

Olympite

LiNa5(PO4)2

Omariniite

Cu8Fe2ZnGe2S12

Omeiite

OsAs2

Ominelite

Fe2+Al3O2(BO3)(SiO4)

Omongwaite

Na2Ca5(SO4)6·3H2O

Omphacite

(Ca,Na)(Mg,Fe,Al)Si2O6

Omsite

Ni2Fe3+(OH)6[Sb(OH)6]

Ondrušite

CaCu4(AsO4)2(AsO3OH)2·10H2O

Oneillite

Na15Ca3Mn3Fe3Zr3Nb(Si25O73)(O,OH,H2O)3(OH,Cl)2

Onoratoite

Sb8O11Cl2

Oosterboschite

(Pd,Cu)7Se5

Opal

SiO2·nH2O

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)