American Mineralogist's Image Gallery

Ganterite: [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2

Comments: BSE image of thin-section showing ganterite (G) portion of a larger muscovite (M) grain. The lighter color corresponds to greater heavy element (Ba) contents. AmMin, v92, p703.
Location: Lincoln Hill dumortierite deposit in the Humboldt Range located near Oreana, Pershing County, Nevada. Scale: Picture size 300 µm.
© American Mineralogist

Ganterite: [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2

Comments: BSE image of thin-section showing ganterite (G) portion of a larger muscovite (M) grain. The lighter color corresponds to greater heavy element (Ba) contents. AmMin, v92, p703.
Location: Lincoln Hill dumortierite deposit in the Humboldt Range located near Oreana, Pershing County, Nevada. Scale: Picture size 300 µm.
© American Mineralogist

George-ericksenite: Na6CaMg(IO3)6(CrO4)2·12(H2O)

Comments: Scanning electron microscope (SEM) photomicrograph of part of a georgeericksenite aggregate: note the cracking of the crystals due to H2O loss under the SEM vacuum. (AmMin 83:391).
Location: Museum specimen labeled as originating from Oficina Chacabuco, Chile.. Scale: See Image.
© American Mineralogist

George-ericksenite: Na6CaMg(IO3)6(CrO4)2·12(H2O)

Comments: Scanning electron microscope (SEM) photomicrograph of part of a georgeericksenite aggregate: note the cracking of the crystals due to H2O loss under the SEM vacuum. (AmMin 83:391).
Location: Museum specimen labeled as originating from Oficina Chacabuco, Chile.. Scale: See Image.
© American Mineralogist

Glushinskite: Mg(C2O4)·2(H2O)

Comments: SEM photo of two large euhedral glushinskite crystals partially embedded in the dried, rotten saguaro matrix. (AmMin, 88:1883).
Location: Crystals associated with the remains of a saguaro, Carnegiea gigantea from south and west central Arizona. Scale: Scale bar 150 µ-m.
© American Mineralogist

Glushinskite: Mg(C2O4)·2(H2O)

Comments: SEM photo of two large euhedral glushinskite crystals partially embedded in the dried, rotten saguaro matrix. (AmMin, 88:1883).
Location: Crystals associated with the remains of a saguaro, Carnegiea gigantea from south and west central Arizona. Scale: Scale bar 150 µ-m.
© American Mineralogist

Haggertyite: Ba[Fe++6Ti5Mg]O19

Comments: Backscattered electron photomicrograph showing a hexagonal haggertyite crystal (white) in contact with richterite (light gray) and serpentized olivine (dark gray). (AmMin, v 83, p 1324).
Location: Prairie Creek lamproite, Arkansas, USA. Scale: See Image.
© American Mineralogist

Haggertyite: Ba[Fe++6Ti5Mg]O19

Comments: Backscattered electron photomicrograph showing a hexagonal haggertyite crystal (white) in contact with richterite (light gray) and serpentized olivine (dark gray). (AmMin, v 83, p 1324).
Location: Prairie Creek lamproite, Arkansas, USA. Scale: See Image.
© American Mineralogist

Hashemite: Ba(Cr,S)O4

Comments: Scanning electron micrograph of a hashemite crystal with common faces labeled. AmMin v68:1223.
Location: Discovered in specimens from building stone quarries, 60 km southeast of Amman, in west-central Jordan. Scale: Picture Size 100 µm.
© American Mineralogist

Hashemite: Ba(Cr,S)O4

Comments: Scanning electron micrograph of a hashemite crystal with common faces labeled. AmMin v68:1223.
Location: Discovered in specimens from building stone quarries, 60 km southeast of Amman, in west-central Jordan. Scale: Picture Size 100 µm.
© American Mineralogist

Hawthorneite: Ba[Ti3Cr4Fe4Mg]O19

Comments: Replacement-textured magnesian chromian spinel (dark gray, CHR) infiltrated by hawthorneite (H, medium gray). B&W polished section, PPL with oil immersion. (AmMin, v74:668).
Location: Metasomatized, harzburgitic xenolith from a diamondiferous kimberlite pipe in Kimberley, South Africa. Scale: See Image.
© American Mineralogist

Hawthorneite: Ba[Ti3Cr4Fe4Mg]O19

Comments: Replacement-textured magnesian chromian spinel (dark gray, CHR) infiltrated by hawthorneite (H, medium gray). B&W polished section, PPL with oil immersion. (AmMin, v74:668).
Location: Metasomatized, harzburgitic xenolith from a diamondiferous kimberlite pipe in Kimberley, South Africa. Scale: See Image.
© American Mineralogist

Haycockite: Cu4Fe5S8  
Mooihoekite: Cu9Fe9S16

Comments: B&W polished section image of mooihoekite-haycockite intergrowth showing tarnished mooihoekite (mh) and haycockite (hc). The small whitest lamellar grains are mackinawite.
Location: Hortonolite dunite (replacement,) pegmatite, Mooihoek Farm, Lydenburg District, Transvaal, South Africa. (AmMin, v57:689). Scale: See Image.
© American Mineralogist

Haycockite: Cu4Fe5S8  
Mooihoekite: Cu9Fe9S16

Comments: B&W polished section image of mooihoekite-haycockite intergrowth showing tarnished mooihoekite (mh) and haycockite (hc). The small whitest lamellar grains are mackinawite.
Location: Hortonolite dunite (replacement,) pegmatite, Mooihoek Farm, Lydenburg District, Transvaal, South Africa. (AmMin, v57:689). Scale: See Image.
© American Mineralogist

Hyttsjoite: Pb18Ba2Ca5Mn++2Fe+++2Si30O90Cl·6(H2O)

Comments: B&W image of hyttsjoite (Hy) with quartz (Q), melanotekite (M), andradite (A), and a mixture of a mineral resembling talc with unidentified phases (T).
Location: Langban mines, Filipstad district, Varmland, Sweden (AmMin, v81:743). Scale: See Image.
© American Mineralogist

Hyttsjoite: Pb18Ba2Ca5Mn++2Fe+++2Si30O90Cl·6(H2O)

Comments: B&W image of hyttsjoite (Hy) with quartz (Q), melanotekite (M), andradite (A), and a mixture of a mineral resembling talc with unidentified phases (T).
Location: Langban mines, Filipstad district, Varmland, Sweden (AmMin, v81:743). Scale: See Image.
© American Mineralogist

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: 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

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

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