Ianthinite   Schoepite

Comments: Purple to brown resinous ianthinite with yellow schoepite and orange becquerelite.
Location: Colorado Plateau area, Saguache County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ice

Comments: White to clear crystals of ice formed on a window at -15 Deg. C.
Location: Minot, North Dakota, USA. Scale: Picture Size 30 cm.
© Dave Barthelmy

Ice

Comments: Classic snowflake (stellar dendrite ice crystal) formed from vapor-rich air between -10 to -22 deg C. Low Temperature Scanning Electron Microscope (LT-SEM) image with inset light microscope image.
Location: Unknown. Scale: Picture size 0.25 mm.
© Eric Erbe / Beltsville Agricultural Research Center

Ice

Comments: Rimed ice crystal. Composite column and plate crystal covered with tubercle deposits from contact with liquid water (supercooled fog). Low Temperature Scanning Electron Microscope (LT-SEM) image.
Location: Unknown. Scale: Picture size 1 mm.
© Eric Erbe / Beltsville Agricultural Research Center

Ice

Comments: Hexagonal ice plate formed from vapor deposition in air at 0 to -3 or -10 to -35 deg. C. Low Temperature Scanning Electron Microscope (LT-SEM) image with inset light microscope image.
Location: Unknown. Scale: Picture size 0.6 mm.
© Eric Erbe / Beltsville Agricultural Research Center

Ice

Comments: Acicular ice crystals formed from vapor deposition in air at -3 to -10 deg. C. Low Temperature Scanning Electron Microscope (LT-SEM) image with inset light microscope image.
Location: Unknown. Scale: Picture size 2 mm.
© Eric Erbe / Beltsville Agricultural Research Center

Idaite

Comments: Deep blue metallic idaite in milky quartz.
Location: Winston, Sierra County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Idrialite

Comments: Yellow platy crystalline idrialite on matrix.
Location: Skaggs Springs, Sonoma County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Iimoriite-(Y)

Comments: Nearly colorless prismatic crystal of immolate-(Y) on dolomite.
Location: Trimouns Talc Mine, Luzenac, Ari?ge, Midi-Pyr?n?es, France. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Ikranite

Comments: Top and bottom images of brownish yellow ikranite aggregate in a green matrix.
Location: Lovozero Massif, Kola Peninsula, Russia. Scale: 1 3/4" x 1".
© Chris Wright / Wrights Rock Shop

Ilesite

Comments: Botryoidal to earthy, cream-colored ilesite.
Location: Chvaletice, Kutn? Hora, Stredocesk? Kraj, Bohemia, Czech Republic. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Ilinskite

Comments: Dark green crystals of ilinskite on matrix.
Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Illite

Comments: Wispy, authigenic illite crystals lining a pore space in sandstone. SEM image from a core sample.
Location: Unknown. Scale: Picture size 33 µ-m.
© OMNI Laboratories, Inc

Ilmajokite

Comments: Opaque dull yellow ilmajokite in syenite matrix.
Location: valley of Ilmajok River, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ilmenite

Comments: Sharp, opaque crystal of Ilmenite.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ilmenorutile

Comments: Dark brown ilmenorutile crystal in matrix.
Location: Iveland, Aust-Agder, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ilsemannite

Comments: Dark blue ilsemannite.
Location: Gl?ckauf Shaft, Himmelsf?rst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Ilvaite   Quartz

Comments: Black, prismatic ilvaite with quartz.
Location: First Sovietskij mine, Dalnjegorsk, Russia. Scale: 3.5 x 4.5 cm.
© Fabre Minerals

Ilvaite   Hedenbergite

Comments: Doubly terminated, black ilvaite on crystals of greenish gray hedenbergite with minor galena.
Location: First Sovietsky mine, Dalnjegorsk, Russia. Scale: 4 x 2.8 x 1.8 cm.
© Fabre Minerals

IMA1999-004a   Rheniite

Comments: Specimen covered with rheniite as micro crystals to .25 mm across.
Location: Kudryaviy Volcano, Iturup Island, Kurilian Chain, Russia. Scale: 4.7 x 3 cm.
© John Veevaert

IMA2002-016   Manganilvaite

Comments: Small, black, very bright crystals of manganilvaite on a matrix of clear quartz, white calcite, and tiny brassy pyrite crystals.
Location: Daye mining area, Hubei, China. Scale: 6 x 5.6 x 3.7 cm.
© Fabre Minerals

IMA2005-023   Menezesite

Comments: Orange rhombododecahedral crystals of menezesite to 0.75mm on matrix.
Location: Jacupiranga mine, Cajati county, Sao Paulo, Brazil. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

IMA2005-026   Phosphohedyphane

Comments: Clear, prismatic phosphohedyphane crystal on matrix.
Location: Argentena mine, Goodsprings, Clark Co., Nevada, USA. Scale: Crystal size 0.5mm.
© Tom Loomis / Dakota Matrix

IMA2006-009   Sanromanite   Juangodoyite   Chalconatronite

Comments: Yellowish, long balded sanromanite crystals in vug with platy, blue juangodoyite replacing green chalconatronite.
Location: Santa Rosa mine, Iquique Province, Tarapaca, Chile. Scale: Picture size 3 mm.
© Tom Loomis / Dakota Matrix

IMA2007-005   Lasalite

Comments: Bright orange efflorescent lasalite crust on sandstone.
Location: Vanadium Queen mine, San Juan Co., Utah, USA. Scale: Picture Size 2 x 2 cm.
© Tom Loomis / Dakota Matrix

Imhofite

Comments: Dark red crystals and aggregates of imhofite in matrix.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Imhofite

Comments: Spherical, spikey-radial brownish black aggregate of imhofite with blocky gray sulfosalt on white dolomite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture width 3 mm.
© Walter Gabriel

Imiterite

Comments: Back metallic prismatic microcrystals of imiterite in white calcite.
Location: Imiter Mine, Jbel Sarho, Anti-Atlas Region, Morocco. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Imiterite

Comments: Silvery needle-like wire crystals of imiterite with rounded tips to 0.5 to .75mm in vuggy calcite.
Location: Imiter mine, Anti-Atlas Mts., Dades Region, Morocco. Scale: Picture size 0.5 cm.
© Tom Loomis / Dakota Matrix

Imogolite

Comments: Tan powdery massive imogolite.
Location: Fukaiwa, Nanuma-shi, Tochigi, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Incaite

Comments: Formless gray lump of incaite, sawn on 2 sides. Former Franz Bauer (Munich) collection.
Location: The label says "Mejillones, Chile" which is certainly wrong, but Mejillones is a railhead and port which served exports from Pirquitas Ag-Sn Deposit, Rinconada Department, Jujuy, Argentina. Scale: Lump size 2 mm.
© Richard Dale / Dale Minerals

Inderborite

Comments: Translucent glassy crystalline inderborite.
Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Inderite

Comments: Prismatic colorless crystal of inderite.
Location: Boron, Kern County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Inderite   Pinnoite

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

Comments: Gray glassy crystalline indialite in rock.
Location: Daimonji yama, Kyoto-shi, Kyoto, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Indialite

Comments: SEM images of indialite clusters. (AmMin, 89:3).
Location: Somma-Vesuvius volcano in unusual pyrometamorphic ejecta. Scale: Scale bar 100 µ-m.
© American Mineralogist

Indium

Comments: A grain of native indium.
Location: Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Inesite

Comments: Bladed crystals of orangish pink Inesite.
Location: N'Chwaning Mine, Kalahari, South Africa. Scale: 14 x 7.5 cm.
© John Veevaert

Inesite   Ruizite

Comments: 1- 3 mm crystal spray of red orange ruizite in an exposed vug in pink inesite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Picture size 1 cm.
© John Veevaert

Inesite   Hubeite

Comments: Brown hubeite aggregates accompanied by prismatic pinkish inesite crystals.
Location: Fengjiashan Mine, Daye, Hubei China. Scale: 5.3 x 3.7 x 1.1 cm.
© Fabre Minerals

Inesite   Hubeite

Comments: Translucent, deep root beer brown, platy hueite crystals in fan-like groups to 1mm with delicate pink laths of inesite.
Location: Fengjiashan Mine, Daye Co., Huangshi Prefecture, Hubei Province, China. Scale: Picture Size 5 mm.
© Tom Loomis / Dakota Matrix

Ingersonite

Comments: Yellowish green crystals of ingersonite to about 0.7mm embedded in matrix rich in dark grains of flipstadite.
Location: Langban, Varmland, Sweden. Scale: 14x10x6mm.
© Tom Loomis / Dakota Matrix

Innelite

Comments: Yellow crystalline granular innelite.
Location: Inagli, Aldan, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Insizwaite   Moncheite

Comments: Back-scattered electron image showing b) intergrowth of taimyrite-tatyanaite with moncheitei-insizwaite (CanMin, v 42, p 611).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image.
© Canadian Mineralogist

Inyoite

Comments: Glassy gray translucent crystals of inyoite 1.5 cm.+, with minor alteration to white meyerhofferite.
Location: Loma Blanca Mine, Jujuy Province, Argentina. Scale: 5.2x4.1x3.1 cm.
© Richard Dale / Dale Minerals

Iodargyrite

Comments: Aggregate crystal of Iodargyrite on matrix.
Location: Broken Hill, New South Wales, Australia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Iodargyrite   Embolite

Comments: Cubo-octahedral crystals of iodaryrite (I) with smaller and darker octahedral crystals of embolite (E).
Location: Broken Hill, New South Wales, Australia. Scale: Specimen size 2x1 cm.
© Dave Barthelmy

Iodargyrite   Coronadite

Comments: Dark, fine-grained massive coronadite with yellowish octahedral iodargyrite crystals.
Location: Broken Hill, New South Wales, Australia. Scale: Picture size 3x2 cm.
© Dave Barthelmy

Iowaite

Comments: Floater crystal of iowaite.
Location: Palabora Mine, Transvaal, South Africa. Scale: Crystal size 1.2 cm.
© John Veevaert

Iquiqueite   Nitratine

Comments: Yellow iquiqueiite in clear, massive nitration.
Location: Salar de Miraje, Antofagasta, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Iranite

Comments: Crystals of iranite to 3mm on brecciated, siliceous matrix.
Location: Sebarz mine, Anarak, Iran. Scale: 3.7 x 2.5 cm.
© John Veevaert

Irhtemite

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

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

Comments: Yellow aggregates of iriginite on matrix.
Location: Cameron area, Coconino County, Arizona, USA. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

Iriginite   Mourite

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

Iron

Comments: Specimen of volcanic rock containing dark gray grains of native Iron. This locality is one of the very few known localities for terrestrial native iron.
Location: Disko Island, Greenland. Scale: Picture size 1 cm.
© John Veevaert

Ishikawaite

Comments: Blocky, metamict crystals of ishikawaite.
Location: Spinelli Quarry (Spinelli prospect), South Glastonbury, Hartford Co., Connecticut, USA. Scale: 15x15x10 mm.
© John Betts - Fine Minerals

Isoferroplatinum   Cuproiridsite

Comments: Gray equant crystal of cuproiridsite in light gray isoferroplatinum. Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.14 mm.
© Thomas Witzke / Abraxas-Verlag

Isoferroplatinum

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   Ruthenium

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

Isokite

Comments: Pale brownish to brown isokite in quartz.
Location: Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Isomertieite   Arsenopalladinite   Gold   Bornite

Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite. Polished section (from microprobe analysis) in reflected light.
Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag

Isovite

Comments: Dark gray metallic grain of isovite.
Location: Verkhneivinsk, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Grain size 0.7 mm.
© Thomas Witzke / Abraxas-Verlag

Iwakiite

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

Ixiolite

Comments: Hemispherical crystalline aggregate of ixiolite.
Location: Muiane mine, Zambesia, Mozambique. Scale: Specimen size 1.3 cm.
© John Veevaert

Izoklakeite

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