Mineral Specimen Images (F)

Fluorcalciobritholite: (Ca,REE)5[(Si,P)O4]3F

Comments: Reddish black fluorcalciobritholite grain from the type locality. Part of the holotype specimen.
Location: Tuliok River head, East slope, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Grain Size 0.8 mm.
© Pavel M. Kartashov

Fluorcanasite: K3Na3Ca5Si12O30F4·H2O

Comments: Small fragment of translucent green fluorcanasite.
Location: Mt. Kukisvumchorr, Khibiny massif, Kola Peninsula, Russia. Scale: Specimen Size 8 x 5 x 2 mm.
© John Betts - Fine Minerals

Fluorcaphite: (Ca,Sr,Ce,Na)5(PO4)3F

Comments: Massive, coarsely crystalline, pale yellowish fluorcaphite.
Location: Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Fluorite: CaF2

Comments: Cubic fluorite crystals with octahedral galena crystals. The largest crystal is 2.1 cm across. Note the exceptional fluorescence of these crystals.
Location: Rogerley Mine, in Weardale, England. Scale: 7.8 x 5.5.
© John Veevaert

Fluorite: CaF2  
Creedite: Ca3Al2(SO4)(F,OH)10·2(H2O)

Comments: Well-developed, prismatic, reddish creedite crystals on green fluorite.
Location: Mina Navidad, Rodeo, Durango, Mexico. Scale: 9 x 5 x 5.3 cm.
© Fabre Minerals

Fluorite: CaF2

Comments: Red-orange octahedral fluorite crystals on an albite matrix with well defined edges and faces.
Location: Pointe Kurz (3600 m altitude), Mont Blanc Massif, Haute-Savoie, France. Scale: Crystal size is 2.1 x 1.5 cm.
© Fabre Minerals

Fluornatromicrolite: (Na,Ca,Bi)2Ta2O6F

Comments: Dark green crystals of fluornatromicrolite in massive white albite..
Location: Alto Quixaba Pegmatite, Quixaba, Frei Martinho, Paraiba, Brazil. Scale: Specimen size 3.8 cm.
© Thomas Witzke

Fluoro-edenite: NaCa2Mg5Si7AlO22(F,OH)2

Comments: Two, tabular crystals of fluoro-edenite on matrix.
Location: Mt. Calvario, (Mt. Etna Volcano), Biancavilla, Catania Province, Sicily, Italy. Scale: Picture size 1.8 mm.
© Thomas Witzke / Abraxas-Verlag

Fluoro-ferroleakeite: NaNa2(Fe++2Fe+++2Li)Si8O22F2

Comments: Euhedral crystal of dark green fluoro-ferroleakeite with a lighter green aegirine rim in an agpaitic rare metal granite. Associated mineral is orange magmatic calcian elpidite with white albite.
Location: Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia. Scale: FOV is 12x10 mm.
© Pavel M. Kartashov

Fluoro-ferroleakeite: NaNa2(Fe++2Fe+++2Li)Si8O22F2

Comments: Heavy mineral concentrate of dark blue to black fluoro-ferroleakeite grains, co-type sample.
Location: Questa, Taos County, New Mexico, USA. Scale: See Image.
© Rruff Database

Fluoro-magnesio-arfvedsonite: NaNa2(Mg,Fe++)4Fe+++[Si8O22](F,OH)2

Comments: Heavy mineral concentrate of small dark green fragments of fluoro-magnesio-arfvedsonite.
Location: Unknown. Scale: See Image.
© Rruff Database

Fluoro-magnesiohastingsite: (Na,K)Ca2(Mg,Fe+++,Ti)5(Si,Al)8O22F2

Comments: Reddish brown aggregates of fluoro-magnesiohastingsite.
Location: Uroi Hill, Hunedoara County, Romania. Scale: Specimen size: 20x8x8 mm.
© Sergey Vasiliev / Systematic Mineralogy

Fluoro-sodic-pedrizite: NaLi2(Mg2Al2Li)?5Si8O22F2  
Clinoholmquistite: [ ](Li2Mg3Al2)Si8O22(OH)2  
Magnesioclinoholmquistite: Li2(Mg,Fe++)3Al2Si8O22(OH)2

Comments: Dark blue fibrous clinoholmquistite with radiating structure, variety magnesioclinoholmquistite. Clinoholmsquitite may be a new aphibole, fluoro-sodic-pedrizite..
Location: Near Murun, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fluorocannilloite: CaCa2(Mg4Al)Si5Al3O22F2

Comments: Greenish, prismatic crystals of fluorocannilloite in matrix.
Location: Yuang Yang Province, Yunnan, China. Scale: Picture size 6 cm.
© Dave Barthelmy

Fluoropargasite: NaCa2(Mg3Fe++Al)5(Si6Al2O22)F2

Comments: Brown crystal of fluoropargasite.
Location: Edenville, Orange Co., New York, USA. Scale: specimen size is 11.0 X 8.0 X 7.0 cm.
© Erik Rutnik / New York State Museum

Fluorophlogopite: KMg3(AlSi3)O10F2

Comments: Books of fluorphlogopite from a magnesian skarn showing the basal cleaveage of the micas..
Location: Arebilovskoe phlogopite deposit, Aldan, Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia. Scale: Specimen size is 3.5x2.5x0.8 cm.
© Pavel M. Kartashov

Fluororichterite: Na(CaNa)Mg5[Si8O22]F2

Comments: Doubly-terminated, stubby, black fluororichterite crystal.
Location: Wilberforce, Monmouth Township, Haliburton Co., Ontario, Canada. Scale: 22x21x15 mm.
© John Betts - Fine Minerals

Fluorvesuvianite: Ca19(Al,Mg)13[SiO4]10[Si2O7]4(F,OH)10

Comments: Acicular crystals of fluorvesuvianite in a clear, calcite matrix. (CanMin, v 41, p 1375).
Location: Lupikko iron mine, Pitkaranta, Karelia, Russia. Scale: Picture size 1.2 cm.
© Canadian Mineralogist

Foggite: CaAl(PO4)(OH)2·(H2O)

Comments: Bright yellow, rounded crystalline aggregates of foggite on matrix.
Location: Palermo #1 mine, North Groton, Crafton County, New Hampshire, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Foitite: [ ]Na<0.5(Fe++,Al)3Al6Si6O18(BO3)3(OH)4

Comments: Dark greenish-black termination of foitite on pinkish elbaite.
Location: Dobra Voda, Moravia, Zapadocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species