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For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

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's Image Gallery With 4041 Images

Geocronite Image

Images:

Geocronite: Pb14(Sb,As)6S23

Comments: Many black geocronite crystals intergrown in milky quartz(?) matrix.
Location: Sala Silver Mine, Sala, Västmanland, Sweden. Scale: 17x17x12 mm.
© John Betts - Fine Minerals

Georgbarsanovite Image

Images:

Georgbarsanovite: Na12(Mn,Sr,REE)3Ca6Fe++3Zr3NbSi25O76Cl2·H2O

Comments: A small translucent crystalline fragment of georgbarsanovite, from the type locality.
Location: Nepheline pegmatite outcrop, Petrelius River, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Fragment Size 0.05 cm,.
© Jeff Weissman / Photographic Guide to Mineral Species

Georgbokiite Image

Images:

Georgbokiite: Cu5O2(SeO3)2Cl2

Comments: Deep reddish brown polished fragment of georgbokiite embedded in epoxy, co-type material.
Location: Tolbachik Volcano, Kamchatka Peninsula, Russia. Scale: Picture Size 300 µm.
© Rruff Database

George-ericksenite Image

Images:

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

Georgechaoite Image

Images:

Georgechaoite: KNaZrSi3O9·2(H2O)

Comments: Single tan crystal of georgechaoite.
Location: Tolbachik Volcano, Kamchatka, Russia. Scale: Crystal Size 1.2 mm.
© Diederik Visser

Georgeite Image

Images:

Georgeite: Cu++5(CO3)3(OH)4·6(H2O)

Comments: Pale blue crusts of georgeite with dark green atacamite.
Location: Carr-Boyd Nickel Mine, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Georgiadesite Image

Images:

Georgiadesite: Pb4(AsO3)Cl4(OH)

Comments: Light blue, pseudo-cubic crystal of georgiadesite.
Location: Laurium, Greece. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Gerasimovskite Image

Images:

Gerasimovskite: (Mn,Ca)(Nb,Ti)5O12·9(H2O) (?)
Ussingite: Na2AlSi3O8(OH)

Comments: Pale tan gerasimovskite pseudomorphous after epistolite crystal, in purple ussingite.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gerenite-(Y) Image

Images:

Gerenite-(Y): (Ca,Na)2(Y,REE)3Si6O18·2(H2O)

Comments: BSE image of eutectoid intergrowth of quartz (black) and gerenite-(Y) (white). (CanMin, v36:793).
Location: Strange Lake peralkaline complex, Quebec-Labrador boundary, Canada. Scale: Scale Bar 100 µm.
© Canadian Mineralogist

Gerhardtite Image

Images:

Gerhardtite: Cu2(NO3)(OH)3

Comments: Emerald green crystalline crust of gerhardtite on copper.
Location: Greenland, Ontonagon County, Michigan, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Germanite Image

Images:

Germanite: Cu26Fe4Ge4S32

Comments: Red metallic germanite, tarnishing black.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gersdorffite Image

Images:

Gersdorffite: NiAsS

Comments: Massive to coarse-grained lead-gray gersdorffite crystals.
Location: Ait Ahmane Mine, Bou Azzer, Anti Atlas Mts., Morocco. Scale: Not Given.
© John Veevaert

Gerstleyite Image

Images:

Gerstleyite: Na2(Sb,As)8S13·2(H2O)

Comments: Small prismatic crystals and massive cinnabar-red gerstleyite on matrix.
Location: Baker mine, U.S. Borax Mine, Boron, Kramer District, Kern Co., California, USA. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Getchellite Image

Images:

Getchellite: AsSbS3

Comments: Bright red getchellite on matrix.
Location: Khaidarkan (Chaidarkan) Sb-Hg deposit, Fergana Valley, Osh District, Kyrgyzstan. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Geversite Image

Images:

Geversite: Pt(Sb,Bi)2

Comments: Several PGM (mertieite, geversite: white) in a silicate matrix (black) of ferrian chromite (FeCr). (CanMin v40:277).
Location: Gabbro-hosted Precambrian Baula Complex, in Orissa, India. Scale: See Image.
© Canadian Mineralogist

Gianellaite Image

Images:

Gianellaite: Hg4(SO4)N2

Comments: Yellow crystalline coatings of gianellaite on calcite.
Location: Mariposa Mine, Terlingua, Brewster County, Texas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gibbsite Image

Images:

Gibbsite: Al(OH)3

Comments: Transparent to white, tabular-prismatic gibbsite crystals.
Location: Saga Quarry, Langesundfjord, Oslo Region, Norway. Scale: Crystal size 1 mm.
© John Veevaert

Gibbsite Image

Images:

Gibbsite: Al(OH)3
Doyleite: Al(OH)3

Comments: Botryoidal spheres of doyleite growing along with its dimorph gibbsite. Analysis shows that doyleite dominates the mix. There are also minor canary yellow phlogopite crystals.
Location: Baoshan, Yunnan, China. Scale: 8 x 6.5 x 1.9 cm.
© Fabre Minerals

Giessenite Image

Images:

Giessenite: Pb13(Cu,Ag)(Bi,Sb)9S28 (?)

Comments: Small clumps of acicular crystal mats of giessenite with rounded cosalite grains (as photographed on pure white fibrous backing material).
Location: Otome Mine, near Kofu, Yamanashi, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Gilalite Image

Images:

Gilalite: Cu5Si6O17·7(H2O)

Comments: Striated, prismatic pale greenish yellow crystal of gilalite.
Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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