Beginning with I.
- IanbruceiteZn2(AsO4)(OH)(H2O) · 2H2OMineralphosphate
- IangreyiteCa2Al7(PO4)2(PO3OH)2(OH,F)15 · 8H2OMineralphosphate
- IanthiniteU4+2(UO2)4O6(OH)4 · 9H2OMineraloxide
- IceH2OMineraloxide
- Iceland SparCaCO3Variety—
- IchnusaiteTh(MoO4)2 · 3H2OMineralsulfate
- IcosahedriteAl63Cu24Fe13Mineralnative
- IdaiteCu3FeS4Mineralsulfide
- IdrialiteC22H14Mineral—
- IgelströmiteFe3+(SbPb)O4Mineraloxide
- Iimoriite-(Y)Y2(SiO4)(CO3)Mineralsilicate
- IkaiteCa(CO3) · 6H2OMineralcarbonate
- IkorskyiteKMn3+(Si4O10) · 3H2OMineralsilicate
- Ikranite(Na,H3O)15(Ca,Mn,REE)6Fe3+2Zr3Si24O66(O,OH)6Cl · nH2OMineralsilicate
- IkunoliteBi4S3Mineralsulfide
- IlesiteMn2+(SO4) · 4H2OMineralsulfate
- Ilímaussite-(Ce)(Ba,Na)10K3Na4.5Ce5(Nb,Ti)6O6(Si12O36)(Si9O18)(O,OH)24Mineralsilicate
- IlinskiteNaCu5O2(Se4+O3)2Cl3Mineraloxide
- IlirneyiteMg0.5[ZnMn3+(TeO3)3] · 4.5H2OMineraloxide
- IlliteK0.65Al2.0[Al0.65Si3.35O10](OH)2Variety—
- Illoqite-(Ce)Na2NaBaCeZnSi6O17Mineralsilicate
- Ilmajokite-(Ce)Na11KBaCe2Ti12Si37.5O94(OH)30 · 29H2OMineralsilicate
- IlmeniteFe2+Ti4+O3Mineraloxide
- Ilmenorutile(Ti,Nb)O2Variety—
- IlsemanniteMo3O8 · nH2O (?)Mineraloxide
- IltisiteHgAgSClMineralsulfide
- IlvaiteCaFe3+Fe2+2O(Si2O7)(OH)Mineralsilicate
- Ilyukhinite(H3O,Na)14Ca6Mn2Zr3Si26O72(OH)2 · 3H2OMineralsilicate
- ImandriteNa12Ca3Fe3+2Si12O36Mineralsilicate
- ImayoshiiteCa3Al(CO3)[B(OH)4](OH)6 · 12H2OMineralsulfate
- ImhofiteTl5.8As15.4S26Mineralsulfide
- ImiteriteAg2HgS2Mineralsulfide
- ImogoliteAl2SiO3(OH)4Mineralsilicate
- Imperial TopazAl2(SiO4)(F,OH)2Variety—
- ImpsoniteVariety—
- InaglyitePbCu3Ir8S16Mineralsulfide
- IncomsartoriteTl6Pb144As246S516Mineralsulfide
- InderboriteCaMg[B3O3(OH)5]2 · 6H2OMineral—
- InderiteMgB3O3(OH)5 · 5H2OMineral—
- IndialiteMg2Al3(AlSi5)O18Mineralsilicate
- IndicoliteA(D3)G6(T6O18)(BO3)3X3ZVariety—
- IndigiriteMg2Al2(CO3)4(OH)2 · 15H2OMineralcarbonate
- InditeFeIn2S4Mineralsulfide
- IndochiniteVariety—
- InesiteCa2Mn2+7Si10O28(OH)2 · 5H2OMineralsilicate
- IngersoniteCa3Mn2+Sb5+4O14Mineraloxide
- IngoditeBi2TeSMineralsulfide
- InneliteBa4Ti2Na(NaCa)Ti(Si2O7)2[(SO4)(PO4)]O2[O(OH)]Mineralsilicate
- InnsbruckiteMn33(Si2O5)14(OH)38Mineralsilicate
- InsizwaitePtBi2Mineralsulfide
- InterliveingiteAgPb18As25S56Mineralsulfide
- IntersiliteNa6Mn(Ti,Nb)Si10(O,OH)28 · 4H2OMineralsilicate
- InyoiteCaB3O3(OH)5 · 4H2OMineral—
- IodargyriteAgIMineralhalide
- Iodian BromargyriteAgBrVariety—
- Iodine and Bromine-bearing ChlorargyriteAg(Cl,Br,I)Variety—
- Iolite(Mg,Fe)2Al3(AlSi5O18)Variety—
- IowaiteMg6Fe3+2(OH)16Cl2 · 4H2OMineraloxide
- IquiqueiteK3Na4Mg(CrO4)B24O39(OH) · 12H2OMineral—
- IraniteCuPb10(CrO4)6(SiO4)2(OH)2Mineralsulfate
- Iraqite-(La)KCa2(La,Ce,Th)Si8O20Mineralsilicate
- IrarsiteIrAsSMineralsulfide
- IrghiziteVariety—
- IrhtemiteCa4Mg(AsO4)2(AsO3OH)2 · 4H2OMineralphosphate
- IridarseniteIrAs2Mineralsulfide
- Iridescent HematiteFe2O3Variety—
- Iridian tulameenite(Pt,Ir)2CuFeVariety—
- Iriginite(UO2)Mo6+2O7 · 3H2OMineraloxide
- IrinarassiteCa3Sn2(SiAl2)O12Mineralsilicate
- Iris AgateSiO2Variety—
- Iris QuartzSiO2Variety—
- IrnimiteVariety—
- Iron RoseFe2O3Variety—
- Iron-bearing Boracite(Mg,Fe)3(B7O13)ClVariety—
- Iron-bearing Calcite(Ca,Fe)CO3Variety—
- Iron-bearing DolomiteCa(Mg,Fe)(CO3)2Variety—
- Iron-bearing Magnesite(Mg,Fe)CO3Variety—
- Iron-bearing PhlogopiteK(Mg,Fe2+)3AlSi3O10(F,OH)2Variety—
- Iron(III)-bearing Ilmenite(Fe2+,Fe3+)TiO3Variety—
- IrtyshiteNa2Ta4O11Mineraloxide
- IseiteMn2Mo3O8Mineraloxide
- IserineFe2+TiO3Variety—
- Ishiharaite(Cu,Ga,Fe,In,Zn)SMineralsulfide
- Ishikawaite(U,Fe,Y)NbO4Mineraloxide
- IshkuliteFe2+(Fe3+,Cr3+)2O4Variety—
- IskandaroviteSb6O7(SO4)2Mineralsulfate
- IsoclasiteCa2(PO4)(OH) · 2H2OMineralphosphate
- IsocubaniteCuFe2S3Mineralsulfide
- IsoferroplatinumPt3FeMineralnative
- IsokiteCaMg(PO4)FMineralphosphate
- IsolueshiteNaNbO3Mineraloxide
- IsomertieitePd11Sb2As2Mineralsulfide
- IsopyreVariety—
- Isovite(Cr,Fe)23C6Mineralnative
- IsseliteCu6(SO4)(OH)10(H2O)4 · H2OMineralsulfate
- ItelmeniteNa2CuMg2(SO4)4Mineralsulfate
- ItoigawaiteSrAl2Si2O7(OH)2 · H2OMineralsilicate
- ItoitePb3GeO2(SO4)2(OH)2Mineralsulfate
- ItsiiteBa2Ca(BSi2O7)2Mineralsilicate
- Ivanyukite-CuCu[Ti4O2(OH)2(SiO4)3] · 7H2OMineralsilicate
- Ivanyukite-KK2[Ti4O2(OH)2(SiO4)3] · 9H2OMineralsilicate
- Ivanyukite-NaNa2[Ti4O2(OH)2(SiO4)3] · 6H2OMineralsilicate
- IvsiteNa3H(SO4)2Mineralsulfate
- Iwashiroite-(Y)YTaO4Mineralsulfate
- IwateiteNa2BaMn(PO4)2Mineralphosphate
- Ixiolite-(Fe2+)(Ta2/3Fe2+1/3)O2Mineraloxide
- Ixiolite-(Mn2+)(Ta2/3Mn2+1/3)O2Mineraloxide
- Ixiolite-(Sc)(Ta0.5Sc0.5)O2Mineraloxide
- IyoiteMnCuCl(OH)3Mineralhalide
- IzoklakeitePb26.4(Cu,Fe)2(Sb,Bi)19.6S57Mineralsulfide