Minerals

Obradovicite-NaNa

[Na2(H2O)16Na(H2O)6][Mo8As2Fe3+3O33(OH)4]

O'danielite

Na◻ZnZn2(AsO4)[AsO3(OH)]2

Odigitriaite

CsNa5Ca5[Si14B2O38]F2

Odikhinchaite

Na9Sr3[(H2O)2Na]Ca6Mn3Zr3NbSi(Si24O72)O(OH)3(CO3)·H2O

Odinite

(Fe3+,Mg,Al,Fe2+)2.5(Si,Al)2O5(OH)4

Odintsovite

K2Na4Ca3Ti2Be4Si12O38

Oenite

CoSbAs

Offretite

KCaMg(Si13Al5)O36·15H2O

Oftedalite

K(ScCa)◻2Be3Si12O30

Ogdensburgite

Ca2Fe3+4Zn(AsO4)4(OH)6·6H2O

Ognitite

NiBiTe

Ohmilite

Sr3(Ti,Fe3+)(Si2O6)2(O,OH)·2H2O

Ohtaniite

Mg3(Si0.5◻0.5)Si2O8

Ojuelaite

ZnFe3+2(AsO4)2(OH)2·4H2O

Okanoganite-(Y)

(Y,REE,Ca,Na,Th)16(Fe3+,Ti)(Si,B,P)10(O,OH)38F10

Okayamalite

Ca2B2SiO7

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)

Olivine

(Mg,Fe)2SiO4

Orthorhombic H: 6.5-7.0

Olkhonskite

Cr2Ti3O9

Olmiite

CaMn[SiO3(OH)](OH)

Olmsteadite

KFe2+2NbO2(PO4)2·2H2O

Olsacherite

Pb2(Se6+O4)(SO4)

Olsenite

KFe4(PO4)3

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

Ootannite

Th4+2W6+4O16·5H2O

Opal

SiO2·nH2O