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McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

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

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

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's Image Gallery With 4041 Images

Cummingtonite Image

Images:

Cummingtonite: [ ]Mg7Si8O22(OH)2

Comments: Light brown prismatic crystalline aggregate of cummingtonite with radiating structure.
Location: West Chesterfield, Hampshire County, Massachusetts, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cuprite Image

Images:

Cuprite: Cu2O

Comments: Dark red ball or sphere of cuprite crystals set on a pearly white dolomite crystal matrix.
Location: Tsumeb mine, Tsumeb, Namibia. Scale: 5 x 2.5 x 4 cm.
© Dan Weinrich

Cuprite Image

Images:

Cuprite: Cu2O
Chrysocolla: (Cu,Al)2H2Si2O5(OH)4·n(H2O)

Comments: Semi-metallic, dark reddish gray, cuprite crystals on blue chrysocolla.
Location: Mashamba West mine, Shaba, Congo. Scale: 7.5 x 4.7 x 2.3 cm.
© Fabre Minerals

Cuprite Image

Images:

Cuprite: Cu2O

Comments: Red, acicular chalcotrichite crystals as a fine, fibrous red mass on matrix.
Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Cuprobismutite Image

Images:

Cuprobismutite: Cu10Bi12S23
Kupcikite: Cu3.4Fe0.6Bi5S10

Comments: Backscattered electron image of kupcíkite (ku) replacing cuprobismutite (cu); both phases are in turn replaced by bsimuthinite derivative (bd79-92).
Location: Felbertal, Austria. Scale: Scale bar 100 µ-m.
© Canadian Mineralogist

Cuprocopiapite Image

Images:

Cuprocopiapite: CuFe+++4(SO4)6(OH)2·20(H2O)

Comments: Grayish green crusts of cuprocopiapite on gypsum.
Location: Copper Queen Mine, Double Mountain Fork of Brazois River, Stonewall County, Texas, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cuproiridsite Image

Images:

Cuproiridsite: CuIr2S4
Isoferroplatinum: (Pt,Pd)3(Fe,Cu)

Comments: Gray equant crystal of cuproiridsite in light gray isoferroplatinum. Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.14 mm.
© Thomas Witzke / Abraxas-Verlag

Cupromakovickyite Image

Images:

Cupromakovickyite: Cu4AgPb2Bi9S18
Hodrushite: Cu8Bi12S22

Comments: Kup?cíkite (ku) and hodrushite (ho) partly replaced by bismuthinite derivative (bd56) with relict lamellae of low-Cu (4P) and cupromakovickyite [4P(Cu,Pb)]. (CanMin, 41:1165).
Location: Scheelite deposit of Felbertal, Austria. Scale: Scale Bar 100 µm.
© Canadian Mineralogist

Cupromakovickyite Image

Images:

Cupromakovickyite: Cu4AgPb2Bi9S18
Makovickyite: Ag1.5Bi5.5S9

Comments: SEM polished section detail of a grain of cupromakovickyite (dark gray) with locally exsolved lamellae (bright gray) of makovickyite. (CanMin, 46:503).
Location: Baita Bihor, Romania.. Scale: See Image.
© Canadian Mineralogist

Cupropavonite Image

Images:

Cupropavonite: AgPbCu2Bi5S10

Comments: BSE image of pavonite matrix (light gray) showing thin exsolution lamellea of cupropavonite (darker gray, C). (Axis, Volume 2, Number 4 (2006)).
Location: Lucky Lucy mine, Darwin mining district, Inyo County, California, USA. Scale: Gail E. Dunning / Mineralogical Record.
© Mineralogical Record

Cupropearceite Image

Images:

Cupropearceite: [Cu6As2S7][Ag9CuS4]

Comments: Crystal of cupropearceite.
Location: Sarbay Mine, near city of Rudnyi, Kostanai Oblast', Kazakhstan. Scale: Crystal size 1 mm.
© Tom Loomis / Dakota Matrix

Cuprorhodsite Image

Images:

Cuprorhodsite: CuRh2S4

Comments: Grain UK296A-1, erlichmanite (1), Ru-rich erlichmanite (2), cuproiridsite (3), and cuprorhodsite (4). (CanMin, v40:1127).
Location: Uktus chromitites complexes in the northern and central Urals, Russia. Scale: See Image.
© Canadian Mineralogist

Cuprorivaite Image

Images:

Cuprorivaite: CaCuSi4O10

Comments: Pale blue grains of cuprorivaite.
Location: Vesuvius, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cuprosklodowskite Image

Images:

Cuprosklodowskite: Cu[(UO2)(SiO2OH)]2·6(H2O)

Comments: Very-fine, acicular crystals of apple green cuprosklodowskite on matrix.
Location: Musonoi Mine, Katanga, Democratic Republic of the Congo. Scale: Not Given.
© John Veevaert

Cuprosklodowskite Image

Images:

Cuprosklodowskite: Cu[(UO2)(SiO2OH)]2·6(H2O)

Comments: Green, acicular cuprosklodowskite crystals.
Location: Mashamba West Mine, Kolwezi, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 3 mm.
© Paul M. Schumacher

Cuprospinel Image

Images:

Cuprospinel: (Cu,Mg)Fe+++2O4

Comments: 2mm piece of from the type specimen matrix with disseminated, black cuprospinel.
Location: Consolidated Rambler mine, Baie Verte, Newfoundland, Canada. Scale: Specimen size 2 mm.
© Tom Loomis / Dakota Matrix

Cuprostibite Image

Images:

Cuprostibite: Cu2(Sb,Tl)
Ussingite: Na2AlSi3O8(OH)

Comments: Massive ussingite hosting grains of the very rare copper antimony-thallium bearing cuprostibite.
Location: Ilimaussaq, Tasseq, Greenland. Scale: 4.8 x3.4 cm.
© John Veevaert

Cuprotungstite Image

Images:

Cuprotungstite: Cu++3(WO4)2(OH)2

Comments: Tan coatings of cuprotungstite on quartz.
Location: Lida, Esmeralda County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Cuprotungstite Image

Images:

Cuprotungstite: Cu++3(WO4)2(OH)2
Jixianite: Pb(W,Fe+++)2(O,OH)7

Comments: Reddish brown crystal druse of jixianite with minor tan cuprotungstite.
Location: Apache Mine, Hidalgo County, New Mexico, USA. Scale: See Image.
© Jeff Weissman / Photographic Guide to Mineral Species

Curetonite Image

Images:

Curetonite: Ba4Al3Ti(PO4)4(O,OH)6

Comments: Translucent tabular crystal of curetonite in crystalline barite.
Location: Near Golconda, Humboldt County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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