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

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: 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: 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: 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

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: 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: 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

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

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

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

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

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

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