Thomas Witzke's Image Gallery

Thomas Witzke's Image Gallery
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Images from Thomas Witzke

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Thomas Witzke's Image Gallery With 518 Images

Ferruccite Image

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Ferruccite: NaBF4  
Avogadrite: (K,Cs)BF4

Comments: Very small, white crystals of ferrite on massive, yellowish avogadrite.
Location: Vesuvius, Naples, Naples province, Campania, Italy. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Fersilicite Image

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Fersilicite: FeSi  
Xifengite: Fe5Si3

Comments: Reflected light image of cream white grain of xifengite (Xi) with exsolution of white gupeiite (Gu) and grey fersilicite (Fe). Epoxy grain mount.
Location: Isovskaya Field, Priasovje, Ukraine. Scale: Picture Size 0.7 mm.
© Thomas Witzke

Fersmite Image

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Fersmite: (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6

Comments: Brown prismatic crystal of fersmite in matrix.
Location: Alpe Rosso, Vigezzo valley, Novara, Piedmont, Italy. Scale: Picture size 1.7 mm.
© Thomas Witzke / Abraxas-Verlag

Fetiasite Image

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Fetiasite: (Fe++,Fe+++,Ti++++)3O2(As+++2O5)

Comments: Sub metallic grayish black crystals of fetiasite on matrix.
Location: Gorb, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Fettelite Image

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Fettelite: [Ag6As2S7][Ag10HgAs2S8]

Comments: Deep scarlet red crystals of fettelite.
Location: Glasberg Quarry, Nieder-Beerbach, Odenwald, Hesse, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Fianelite Image

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Fianelite: Mn++2V+++++(V+++++,As+++++)O7·2(H2O)

Comments: Small reddish-brown inclusions of fianelite in matrix.
Location: Fianel Mine, Val Ferrera, Grischun (Grisons; Graubünden), Switzerland. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Fibroferrite Image

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Fibroferrite: Fe+++(SO4)(OH)·5(H2O)

Comments: Tan-white, acicular crystals of fibroferrite on matrix.
Location: Lichtenberg Mine, Ronneburg U Deposit, Gera district, Thuringia, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Fichtelite Image

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Fichtelite: C19H34

Comments: Colorless crystals of fichtelite on fossil wood.
Location: Marktredwitz, Fichtelgebirge, Bavaria, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Finnemanite Image

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Finnemanite: Pb5(As+++O3)3Cl

Comments: Black, prismatic, twinned crystal of finnemanite.
Location: Långban, Filipstad, Värmland, Sweden. Scale: Crystal length 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Fischesserite Image

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Fischesserite: Ag3AuSe2  
Klockmannite: CuSe

Comments: Pinkish-grey fischesserite (Fl) with fine-grained bluish-grey klockmannite (Kl) and grey clausthalite (Cl). Polished section from microprobe analysis in reflected light, parallel nicols.
Location: Predborice, Bohemia, Czech Republic. Scale: Picture size 0.7 mm.
© Thomas Witzke

Fletcherite Image

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Fletcherite: Cu(Ni,Co)2S4

Comments: Small black crystals of fletcherite in halite. Very unusual association, from a hydrothermal vein cutting a halite deposit.
Location: Bernburg, Saxony-Anhalt, Germany. Scale: Picture size 1.2 mm.
© Thomas Witzke

Florencite-(La) Image

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Florencite-(La): (La,Ce)Al3(PO4)2(OH)6

Comments: Green, acicular crystalline aggregates of florencite-(La).
Location: Igarapé Bahia Mine, Carajás ridge, Pará, North Region, Brazil. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Fluorcaphite Image

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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

Fluornatromicrolite Image

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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 Image

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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

Foordite Image

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Foordite: Sn++(Nb,Ta)2O6

Comments: Brownish massive foordite.
Location: Manono, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Francisite Image

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Francisite: Cu3Bi(SeO3)2O2Cl

Comments: Greenish crusts of francisite on matrix.
Location: Baccu Locci Mine, Villaputzu, Cagliari Province, Sardinia, Italy. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Frankhawthorneite Image

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Frankhawthorneite: Cu2Te++++++O4(OH)2

Comments: Very small green crystals of frankhawthorneite on a light green unknown mineral.
Location: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Freieslebenite Image

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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

Fuloppite Image

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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
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