Mineral Specimen Images (I)

Ianthinite: (UO2)·5(UO3)·10(H2O)  
Schoepite: (UO2)8O2(OH)12·12(H2O)

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: H2O

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: H2O

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: H2O

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: H2O

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: H2O

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: Cu5FeS6

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

Iddingsite: MgO.Fe2O3.3SiO2·4(H2O)

Comments: Red iddingsite with green olivine. Iddingsite alteration of olivine commonly seen in thin-sections is actually a fine-grained mixture of goethite+quartz+chlorite.
Location: Amboy, San Bernadino County, California, USA. Scale: Specimen Size 5x5x3 cm.
© John Betts - Fine Minerals

Idrialite: C22H14

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): Y2(SiO4)(CO3)

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

Ikaite: CaCO3·6(H2O)

Comments: Rounded, colorless crystals of ikaite extracted from Antarctic sea ice cores. Ikaite may be more common than previously thought.
Location: Southern sea near the Antarctic shore. Scale: See Image.
© Geophyscial Research Letters

Ikranite: (Na,H3O)15(Ca,Mn,REE)6Fe+++2Zr3([ ],Zr)([ ],Si)Si24O66(O,OH)6Cl·2-3H2O

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

Ikunolite: Bi4(S,Se)3

Comments: B&W polished section showing kunolite( ik) in association with bismuth bi) and bismuthinite (bt). (AmMin, v47:1431).
Location: Bismuth-molybdenite pipes at Kingsgate in the New England district of New South Wales, Australia. Scale: 150 X.
© American Mineralogist

Ikunolite: Bi4(S,Se)3

Comments: Gray metallic grains of ikunolite on matrix.
Location: Also-Rozsa adit, Nagyborzsony, Borzsony Mts., Pest Co., Hungary. Scale: Specimen Size 10x5 mm.
© Sergey Vasiliev / Systematic Mineralogy

Ilesite: (Mn,Zn,Fe++)SO4·4(H2O)

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

Ilinskite: NaCu5O2(SeO3)2Cl

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: (K,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)]

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: (Na,Ce,La,Ba)2TiSi3O5(OH)10·n(H2O) (?)

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: Fe++TiO3

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

Ilmenorutile: (Ti,Nb,Fe+++)O2

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