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Inderite: MgB3O3(OH)5·5(H2O)
Comments: Prismatic colorless crystal of inderite. Location: Boron, Kern County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Inderite: MgB3O3(OH)5·5(H2O) Pinnoite: MgB2O4·3(H2O)
Comments: Pale green translucent crystalline pinnoite on chalky white inderite. Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Indialite: Mg2Al4Si5O18
Comments: Gray glassy crystalline indialite in rock. Location: Daimonji yama, Kyoto-shi, Kyoto, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Innelite: (Na,Mg,Ca)2(Ba,K)4Ti3(Si2O7)2(SO4)2(OH,F)
Comments: Yellow crystalline granular innelite. Location: Inagli, Aldan, Republic of Sakha, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Irhtemite: Ca4Mg(AsO3OH)2(AsO4)2·4(H2O)
Comments: Pink acicular divergent microcrystals of irhtemite on matrix. Location: Irhtem Mine, near Bou-Azzer, Ouarzazate, Morocco. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Iridium: (Ir,Os,Ru,Pt)
Comments: Silvery metallic crystalline iridium micrograin and irregular nuggets. Location: Fox Gulch, Goodnews Bay, Alaska, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Iriginite: (UO2)(Mo++++++2O7)·3(H2O) Mourite: U++++Mo++++++5O12(OH)10
Comments: Purple to violet sub-metallic mourite coatings with yellow iriginite. Location: 'North Caucasus', probably Kyzylsai Deposit, Chu-Ili Mountains, Balkhash, Zezkazgan, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Isoferroplatinum: (Pt,Pd)3(Fe,Cu)
Comments: Irregularly shaped silver metallic nugget of isoferroplatinum with minor chromite. Location: Fox Gulch, Goodnews Bay. Alaska, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Isoferroplatinum: (Pt,Pd)3(Fe,Cu) Ruthenium: (Ru,Ir,Os)
Comments: Scanning electron micrograph of polished section of ruthenium nugget with isoferroplatinum inclusions. Location: Miass River, Chelyabinsk District, Southern Urals, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Iwakiite: Mn++(Fe+++,Mn+++)2O4
Comments: Back fine-grained granular iwakiite in pink rhodonite. Location: Gazaisho Mine, Iwaki, Fukushima, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Izoklakeite: Pb27(Cu,Fe)2(Sb,Bi)19S57
Comments: Prismatic metallic gray microcrystal of izoklakeite (mounted on paper). Location: Vena Mine, Bergslagen, Orebro, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Jacobsite: (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4 Ganomalite: Pb9Ca5Mn++Si9O33
Comments: White crystalline ganomalite with dark granular jacobsite. Location: Jacobsberg, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Jadeite: Na(Al,Fe+++)Si2O6 Stronalsite: SrNa2Al4Si4O16
Comments: White stronalsite veinlets in massive pale green jadeite. Location: Ohasa, Okayama, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Jagoite: (Pb,Na,Ca)3(Fe+++,Mg)Si3O10(Cl,OH)
Comments: Yellow crystalline fragment of jagoite in hausmannite. Location: Langban, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Jagowerite: BaAl2(PO4)2(OH)2
Comments: Pale green to white massive jagowerite. Location: Hess River, Yukon Territory, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Jalpaite: Ag3CuS2
Comments: Tarnished black lustrous masses of jalpaite in rock with blue chrysocolla. Location: La Mesa, Chihuahua, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Jamborite: (Ni++,Ni+++,Fe)(OH)2(OH,S,(H2O))
Comments: Green coatings of jamborite on millerite filaments, in vug. Location: Halls Gap, Lincoln County, Kentucky, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Janhaugite: (Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2Si4O15(OH,F,O)3 Dalyite: K2ZrSi6O15
Comments: Tan crystalline dalyite (arrow) with reddish brown janhaugite. Location: Gjerdingen, Nordmark, north of Oslo, Oslo, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Janhaugite: (Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2Si4O15(OH,F,O)3
Comments: Reddish-brown columnar crystalline janhaugite in white matrix. Location: Gjerdingen, Nordmark, north of Oslo, Oslo, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Jarlite: Na(Sr,Na,[ ])7(Mg,[ ])Al6F32(OH,H2O)2
Comments: Tan radial botryoidal waxy masses of jarlite in matrix. Location: Ivigtut, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species