Mineral Specimen Images (I)

Ilsemannite: Mo3O8·n(H2O) (?)

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

Iltisite: HgSAg(Cl,Br)

Comments: Reddish brown acicular iltisite crystals associated with baryte, cornwallite, strashmirite and quartz.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-Cote d'Azur, France. Scale: See Image.
© Rruff Database

Ilvaite: CaFe++2Fe+++Si2O7O(OH)  
Quartz: SiO2

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

Ilvaite: CaFe++2Fe+++Si2O7O(OH)  
Hedenbergite: CaFe++Si2O6

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

Imandrite: Na12Ca3Fe+++2Si12O36

Comments: Honey-yellow colored rims of imandrite surrounding grains of pink eudialyte.
Location: Vuonnemiok River Valley, Khibiny Massif, Kola Peninsula, Russia. Scale: Picture Size 5 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Imhofite: Tl6CuAs16S40

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: Tl6CuAs16S40

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: Ag2HgS2

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: Ag2HgS2

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: Al2SiO3(OH)4

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

Incaite: Pb4Sn4FeSb2S15

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: CaMg[B3O3(OH)5]2·6(H2O)

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

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

Indialite: Mg2Al4Si5O18

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

Indite: Fe++In2S4

Comments: Two metallic-gray grains of fresh indite in quartz associated with brown and creamy-colored cassiterite.
Location: Dzhalinda Sn Deposit, Malyi Khingan Range, Khabarovskiy Kray, Far-Eastern Region, Russia. Scale: FOV is 3x2 mm.
© Pavel M. Kartashov

Indium: In

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

Inesite: Ca2Mn7Si10O28(OH)2·5(H2O)

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

Inesite: Ca2Mn7Si10O28(OH)2·5(H2O)  
Ruizite: CaMn+++Si2O6(OH)·2(H2O)

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