| jachymovite | (UO2)8SO4(OH)14·13H2O |
| jacobsite | (Mn,Fe,Mg)(Fe,Mn)2O4 |
| jade | general term |
| jadeite | Na(Al,Fe)Si2O6 |
| jaffeite | Ca6Si2O7(OH)6 |
| jagoite | Pb3FeSi4O12(Cl,OH) |
| jagowerite | BaAl2(PO4)2(OH)2 |
| jahnsite-(CaMnFe) | CaMnFe2Fe2(PO4)4(OH)2·8H2O |
| jahnsite-(CaMnMg) | CaMnMg2Fe2(PO4)4(OH)2·8H2O |
| jahnsite-(CaMnMn) | CaMnMn2Fe2(PO4)4(OH)2·8H2O |
| jahnsite-(MnMnMn) | MnMnMn2Fe2(PO4)4(OH)2·8H2O |
| jaipurite | CoS |
| jalpaite | Ag3CuS2 |
| jamborite | (Ni3+,Ni2+,Fe)(OH)2(OH,S,H2O) |
| jamesite | Pb2Zn2Fe5(AsO4)5O4 |
| jamesonite | Pb4FeSb6S14 |
| janggunite | Mn5-X(Mn,Fe)1+XO8(OH)6, x~0.2 |
| janhaugite | Na3Mn3Ti2Si4O15(OH,F,O)3 |
| jankovicite | Tl5Sb9(As,Sb)4S22 |
| jarlite | Na2(Sr,Na)14Mg2Al12F64(OH,H2O)4 |
| jarosewichite | Mn3MnAsO4(OH)6 |
| jarosite | K2Fe6(SO4)4(OH)12 |
| jaskolskiite | Pb11Cu(Sb,Bi)9S25 |
| jasmundite | Ca11(SiO4)4O2S |
| jasper | quartz |
| jeanbandyite | (Fe,Mn)Sn(OH)6 |
| jedwabite | Fe7(Ta,Nb)3 |
| jeffreyite | (Ca,Na)2(Be,Al)Si2(O,OH)7 |
| jennite | H2Ca9Si6O18(OH)8·6H2O |
| jensenite | Cu3TeO6·2H2O |
| jentschite | TlPbAs2SbS6 |
| jeppeite | (K,Ba)2(Ti,Fe)6O13 |
| jeremejevite | Al6B5O15(F,OH)3 |
| jeromite | As(S,Se)2 |
| jerrygibbsite | Mn9(SiO4)4(OH)2 |
| jervisite | (Na,Ca,Fe)(Sc,Mg,Fe)Si2O6 |
| jianshuiite | (Mg,Mn)Mn3O7·3H2O |
| jimboite | Mn3B2O6 |
| jimthompsonite | (Mg,Fe)5Si6O16(OH)2 |
| jinshajiangite | (Ba,Ca)4(Na,K)5(Fe,Mn)15(Ti,Fe,Nb,Zr)8Si15O64(F,OH)6 |
| jixianite | Pb(W,Fe)2(O,OH)7 |
| joaquinite-(Ce) | Ba2NaCe2Fe(Ti,Nb)2Si8O26(OH,F)·H2O |
| joaquinite group | |
| joesmithite | PbCa2(Mg,Fe2+,Fe3+)5Si6Be2O22(OH)2 |
| johachidolite | CaAlB3O7 |
| johannite | Cu(UO2)2(SO4)2(OH)2·8H2O |
| johannsenite | CaMnSi2O6 |
| johillerite | Na(Mg,Zn)3Cu(AsO4)3 |
| johnbaumite | Ca5(AsO4)3OH |
| johninnesite | Na2Mn9(Mg,Mn)7(AsO4)2(Si6O17)2(OH)8 |
| johnsomervilleite | Na2Ca(Mg,Fe,Mn)7(PO4)6 |
| johnwalkite | K(Mn,Fe3+,Fe2+)2(Nb,Ta)(PO4)2O2(H2O,OH)2 |
| jokokuite | MnSO4·5H2O |
| joliotite | UO2CO3·nH2O |
| jolliffeite | NiAsSe |
| jonesite | Ba4(K,Na)2Ti4Al2Si10O36·6H2O |
| jordanite | Pb14(As,Sb)6S23 |
| jordisite | MoS2 |
| jorgensenite | Na4(Sr,Ba)14Al12F64(OH,F)4 |
| joseite-A | Bi4TeS2 |
| joseite-B | Bi4Te2S |
| josephinite | awaruite |
| jouravskite | Ca6Mn2(SO4,CO3)4(OH)12·26H2O |
| juabite | FeCu10(TeO3)4(AsO4)4(OH)2·4H2O |
| juanite | Ca10Mg4Al2Si11O39·4H2O |
| julgoldite-(Fe2+) | Ca2Fe2+(Fe,Al)2(SiO4)(Si2O7)(OH)2·H2O |
| julgoldite-(Fe3+) | Ca2Fe3+(Fe,Al)2(SiO4)(Si2O7)(O,OH)2·H2O |
| julienite | Na2Co(SCN)4·8H2O |
| jungite | Ca2Zn4Fe8(PO4)9(OH)9·16H2O |
| junitoite | CaZn2Si2O7·H2O |
| junoite | Pb3Cu2Bi8(S,Se)16 |
| juonniite | CaMgSc(PO4)2OH·4H2O |
| jurbanite | AlSO4OH·5H2O |