's Image Gallery

Fergusonite-(Y): YNbO4  
Plumbopyrochlore: (Pb,Y,U,Ca)2-xNb2O6(OH)

Comments: Brown resinous fergusonite-(Y) (as per communication with Pavel M. Kartashov) with yellowish plumbopyrochlore.
Location: Ploskaya Mountain, Keivy Region, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fergusonite-beta-(Ce): (Ce,La,Nd)NbO4

Comments: Dark brown vitreous amorphous (metamict) fragments of fergusonite-beta-(Ce).
Location: Amherst County, Virginia, USA. Scale: See Image.
© Rruff Database

Fergusonite-beta-(Y): YNbO4

Comments: Black crystal of fergusonite-β-(Y) in matrix.
Location: Fukushima City, Fukushima Prefecture, Japan. Scale: Crystal Size 6 mm.
© Nagashima mineral collection

Fermorite: (Ca,Sr)5(AsO4,PO4)3(OH)

Comments: Pinkish crystalline massive fermorite.
Location: Sitipar, Chindwara District, India. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fernandinite: CaV8O20·4(H2O)

Comments: Greenish-yellow fernandinite coatings on sandstone.
Location: Deremo-Snyder Mine, Egnar, San Miguel County, Colorado. USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Feroxyhyte: Fe+++O(OH)

Comments: Brown botryoidal feroxyhyte.
Location: Pachi Limani, Laurium, Attiki, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrarisite: Ca5(AsO3OH)2(AsO4)2·9(H2O)

Comments: Translucent crystal spray of ferrarisite on matrix.
Location: Gift Grube, Sainte-Marie-aux-Mines, Alsace, Haute-Rhin, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferri-magnesiotaramite: NaCaNaMg3Fe+++2[Si6Al2O22](OH)2

Comments: Small fragment of ferri-magnesiotaramite.
Location: Beiqua Mt, Verazza, Genova, Italy. Scale: Specimen Size 5 x 3 mm.
© Sergey Vasiliev / Systematic Mineralogy

Ferriallanite-(Ce): CaCe(Fe+++,Fe++,Al)3[SiO4][Si2O7]O(OH)  
Kainosite-(Y): Ca2(Y,Ce)2Si4O12(CO3)·(H2O)

Comments: Short prismatic black crystals of ferriallanite-(Ce) in white slightly weathered kainosite-(Y). Orange prisms are zircons of the first generation. Fragment of the holotype specimen.
Location: Neprimetnyi pegmatite, Mount Ulyn Khuren, Khaldzan Buragtag Massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia. Scale: Crystal Size 2 mm.
© Pavel M. Kartashov

Ferriallanite-(Ce): CaCe(Fe+++,Fe++,Al)3[SiO4][Si2O7]O(OH)  
Fergusonite-(Nd): (Nd,Ce)(Nb,Ti)O4

Comments: Orange-brown ferusonite-(Nd) grains in ferriallanite-(Ce) zone of the vein. Main black inclusions are ferriallanite-(Ce) crystals. White matrix is mixture of calcian strontianite and strontian calcite.
Location: Tornebohmite vein, Biraya Fe-REE ore occurrence, Biraya and Bya Rivers confluence area (Chara Basin), Vitim Plateau, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: FOV 1 cm.
© Pavel M. Kartashov

Ferribarroisite: CaNa(Fe++,Mg)3Fe+++2[AlSi7O22](OH)2

Comments: Small grains of ferribarroisite in capsule.
Location: Ilmeny Mts, Chelyabinsk District, South Urals, Russia. Scale: Not Given.
© Sergey Vasiliev / Systematic Mineralogy

Ferric-ferronyboite: NaNa2(Fe++)3(Fe+++)2(Si7Al)O22(OH)2

Comments: Black granular-prismatic masses of ferric-ferronyboite. Associated minerals are white albite and beige zircon.
Location: Abdong (Aptong) Zr-Nb deposit, Pyonggang-gun, Kangwon Province, North Korea. Scale: Picture Size 12x10 mm.
© Pavel M. Kartashov

Ferricopiapite: Fe+++2/3Fe+++4(SO4)6(OH)2·20(H2O)

Comments: Earthy, yellow ferricopiapite, variety chalcanthite.
Location: Bisbee, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferricopiapite: Fe+++2/3Fe+++4(SO4)6(OH)2·20(H2O)  
Goldichite: KFe+++(SO4)2·4(H2O)  
Coquimbite: Fe+++2(SO4)3·9(H2O)

Comments: Prismatic to fibrous crystals of goldichite on white massive coquimbite with yellow ferricopiapite.
Location: Dexter No. 7 Mine, Calf Mesa, San Rafael Swell, Emery County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrierite-K: (K,Na)2Mg(Si,Al)18O36·9(H2O)

Comments: Tufts of white to pinkish acicular ferrierite-K on blocky, transparent clinoptitolite.
Location: Kanan Road Quarry, Agoura, Los Angeles Co., California, USA. Scale: Not Given.
© Diederik Visser

Ferrierite-Mg: (Mg,Na,K)2Mg(Si,Al)18O36·9(H2O)

Comments: Orange, druzy crusts of ferrierite-Mg lining a pocket.
Location: Monte Lake, Kamloops Mining Division, British Columbia, Canada. Scale: Specimen Size 3.2 x 2.6 x 2.5 cm.
© Rob Lavinsky

Ferrierite-Na: (Na,K)2Mg(Si,Al)18O36·9(H2O)

Comments: Rounded crystalline aggregate of yellow to brown ferrierite.
Location: Monte Lake, British Columbia, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ferrihydrite: Fe+++2O3·0.5(H2O)

Comments: Brown ferrihydrite.
Location: Fischersdorf, near Saalfeld, Thuringia, Germany. Scale: Picture size 6 mm.
© Thomas Witzke

Ferrilotharmeyerite: Ca(Zn,Cu++)(Fe+++,Zn)(AsO4)2(OH,H2O)2

Comments: Brown crystalline aggregates of ferrilotharmeyerite on quartz.
Location: Pucher Shaft, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Ferrimolybdite: Fe+++2(MoO4)3·8(H2O)

Comments: Greenish-yellow crystalline aggregates of ferrimolybdite on a gossanous matrix.
Location: Quarry No 2, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag