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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.

Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

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

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

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's Image Gallery With 4041 Images

Freieslebenite Image

Images:

Freieslebenite: AgPbSbS3

Comments: Dark gray prismatic crystal of freieslebenite on quartz.
Location: Neue Hoffnung Gottes Mine, Bräunsdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Fresnoite Image

Images:

Fresnoite: Ba2TiSi2O8

Comments: Yellow to peach colored crystals of fresnoite.
Location: Junnila Mine, San Benito County, California, USA. Scale: Crystal size 5 mm.
© John Veevaert

Freudenbergite Image

Images:

Freudenbergite: Na2Fe+++2Ti6O16

Comments: BSE image of a sector-zoned crystal of freudenbergite. The bright pyramids correspond to sector (001), and the darker ones belong to sector (100).
Location: Peralkaline alkali syenite dikes at Katzenbuckel, southwestern Germany. Scale: See Image.
© Canadian Mineralogist

Friedelite Image

Images:

Friedelite: Mn8Si6O15(OH,Cl)10

Comments: Rose red crystals of friedelite on matrix.
Location: Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Friedrichite Image

Images:

Friedrichite: Pb5Cu5Bi7S18
Krupkaite: PbCuBi3S6
Benjaminite: (Ag,Cu)3(Bi,Pb)7S12

Comments: Crystals of a mixture of friedrichite, krupkaite, and benjaminite, with quartz crystals.
Location: Estela Mine, Julcani District, Junin, Peru. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Frohbergite Image

Images:

Frohbergite: FeTe2

Comments: Irregular black mssses of frohbergite in quartzite matrix.
Location: San Simon Basin (San Simon River; Bowie Chabazite deposit), Bowie area, Cochise Co., Arizona, USA. Scale: Picture Size 2.5 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Frolovite Image

Images:

Frolovite: CaB2(OH)8

Comments: Clear to white crystalline frolovite in rock.
Location: Solongo, Republic of Buryatia, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Frondelite Image

Images:

Frondelite: Mn++Fe+++4(PO4)3(OH)5
Kidwellite: Na(Fe+++,Cu)9+x(PO4)6(OH)11·3(H2O)

Comments: Root beer colored crystals of frondelite and white kidwellite sticks on matrix.
Location: Sapucaia, Minas Gerais, Brazil. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Froodite Image

Images:

Froodite: PdBi2

Comments: Froodite grain (see arrow) in mostly chalcopyrite matrix.
Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Froodite Image

Images:

Froodite: PdBi2
Maslovite: PtBiTe
Altaite: PbTe

Comments: Reflected light photomicrograph of maslovite (M), froodite (F), and altaite (A), in chalcopyrite matrix.
Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fuenzalidaite Image

Images:

Fuenzalidaite: K6(Na,K)4Na6Mg10(SO4)12(IO3)12·12(H2O)

Comments: SEM image of hexagonal (trigonal) crystals of fuenzalidaite. (AmMin, v79:1003).
Location: Nitrate mine about I km south of the former plant site of Oficina Santa Luisa, northern Chile. Scale: Scale Bar 10 µm.
© American Mineralogist

Fukuchilite Image

Images:

Fukuchilite: Cu3FeS8

Comments: Dark brown fine-grained fukuchilite in white gypsum.
Location: Hanawa Mine, Kazuno City, Akita, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fuloppite Image

Images:

Fuloppite: Pb3Sb8S15

Comments: Gray crystals of fülöppite on quartz.
Location: Neue Hoffnung Gottes Mine, Bräunsdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Furongite Image

Images:

Furongite: Al2(UO2)(PO4)3(OH)2·8(H2O)

Comments: Pale yellow crystalline furongite.
Location: Furong Lin, Ling Wu, Western Hunan Province, China. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Furutobeite Image

Images:

Furutobeite: (Cu,Ag)6PbS4

Comments: Black, prismatic furutobeite crystals.
Location: Tsumeb, Namibia. Scale: See Image.
© William Pinch

Gabrielite Image

Images:

Gabrielite: Tl2AgCu2As3S7

Comments: SEM picture of gabrielite showing the dominant (001) face with striation along a axis and (presumable) twinning along (100). (CanMin, v44:135).
Location: Lengenbach locality, at Binntal, Canton Valais, Switzerland. Scale: See Image.
© Canadian Mineralogist

Gabrielsonite Image

Images:

Gabrielsonite: PbFe++(AsO4)(OH)

Comments: Jet black, lustrous crystal grain, showing no faces, fractured to about 0.75mm with white pectolite-hematite matrix.
Location: Langban, Varmland, Sweden. Scale: 2.5 x 1.5 x 1.5cm.
© Tom Loomis / Dakota Matrix

Gadolinite-(Ce) Image

Images:

Gadolinite-(Ce): (Ce,La,Nd,Y)2Fe++Be2Si2O10

Comments: Sharp, well crystallized single crystal of brown gadolinite.
Location: Buer, Bjørkedalen, Porsgrunn, Telemark, Norway. Scale: 18x14x8 mm.
© John Betts - Fine Minerals

Gadolinite-(Y) Image

Images:

Gadolinite-(Y): Y2Fe++Be2Si2O10
Calciogadolinite: CaREE(Fe+++)Be2Si2O10

Comments: Black vitreous, metamict massive gadolinite-(Y) also known as calcian gadolinite.
Location: Ytterøya Mine, Røvika, Ytterøya (island), Levanger, Nord-Trondelag, Norway. Scale: See Image.
© Rruff Database

Gagarinite-(Y) Image

Images:

Gagarinite-(Y): NaCaY(F,Cl)6

Comments: Brownish to gray crystals of gagarinite-(Y) in matrix.
Location: Gjerdingen, Jevnaker, Oppland, Norway. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

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