Thomas Witzke's Image Gallery

Mahnertite: (Na,Ca)Cu++3(AsO4)2Cl·5(H2O)

Comments: Blue mahnertite in quartz.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-Côte d'Azur, France. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Malhmoodite: FeZr(PO4)2·4(H2O)

Comments: Small white aggregate of malhmoodite on matrix.
Location: Union Carbide Mine, Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Mallestigite: Pb3Sb+++++(SO4)(AsO4)(OH)6·3(H2O)

Comments: Colorless prismatic crystals of mallestigite.
Location: Mallestiger Mittagskogel, Finkenstein, Villach, Carinthia, Austria. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Manganite: MnO(OH)  
Sudoite: Mg2(Al,Fe+++)3Si3AlO10(OH)8

Comments: Pinkish to nearly white earthy sudoite with dark manganite.
Location: Ilfeld, Nordhausen, Erfurt district, Harz Mts, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Manganoneptunite: KNa2Li(Mn,Fe++)2Ti2Si8O24  
Shkatulkalite: {(Na,Mn,Ca,[ ])4[Nb2(O,H2O)4Si4O14](OH,F)2}·2(H2O,[ ])

Comments: Pearly white shkatulkalite with brown mangan-neptunite grains.
Location: Shkatulka pegmatite, Umbozero mine, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Manganosite: MnO

Comments: Dark green manganosite in matrix.
Location: Nordmark, Filipstad, Värmland, Sweden. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Mansfieldite: AlAsO4·2(H2O)

Comments: White, spherical aggregates of mansfieldite.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-Côte d'Azur, France. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Marrite: PbAgAsS3

Comments: A prismatic crystal of marrite with small rounded crystals of galena in quartz.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Marrucciite: Hg3Pb16Sb18S46

Comments: Black, acicular crystals of marrucciite embedded in dolomite marble..
Location: Buca della Vena Mine, Stazzema, Tuscany, Italy.. Scale: Picture size 4 mm.
© Thomas Witzke

Mascagnite: (NH4)2SO4

Comments: White, botryoidal mascagnite.
Location: Carola Mine, Freital, Dresden, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Maucherite: Ni11As8

Comments: Massive, fine-grained, dark maucherite with cream-colored barite.
Location: Eisleben, Mansfeld Basin, Saxony-Anhalt, Germany. Scale: Specimen size 8 cm.
© Thomas Witzke / Abraxas-Verlag

Mbobomkulite: (Ni,Cu)Al4(NO3,SO4)2(OH)12·3(H2O)

Comments: White earthy mbobomkulite.
Location: Jomac Uranium mine, White Canyon, San Juan Co., Utah, USA. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Mcalpineite: Cu++3Te++++++O6·(H2O)

Comments: Dark green crystals of mcalpineite in matrix.
Location: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA. Scale: Picture size 1.7 mm.
© Thomas Witzke / Abraxas-Verlag

Meixnerite: Mg6Al2(OH)18·4(H2O)

Comments: Colorless crystals of meixnerite.
Location: Zeilberg Quarry, Maroldsweisach, Bavaria, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Metamunirite: Na2[V+++++2O6] or NaVO3

Comments: Colorless, acicular crystals of metamunirite.
Location: Burro Mine, Slick Rock District, San Miguel Co., Colorado, USA. Scale: Picture size 1.6 mm.
© Thomas Witzke / Abraxas-Verlag

Metarossite: CaV2O6·2(H2O)

Comments: Light yellow metarossite on sandstone.
Location: Burro Mine, Slick Rock District, San Miguel Co., Colorado. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Metaschoepite: UO3·n(H2O)(n<2)  
Antlerite: Cu3(SO4)(OH)4

Comments: Yellow crystals of metaschoepite with green antlerite.
Location: Pöhla-Tellerhäuser Gallery, Pöhla, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Metasideronatrite: Na2Fe+++(SO4)2(OH)·(H2O)  
Tamarugite: NaAl(SO4)2·6(H2O)

Comments: Orange metasideronatrite with white tamarugite.
Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Metavoltine: K4Na4(Fe++,Zn)Fe+++6(SO4)12O2·20(H2O)  
Alunogen: Al2(SO4)3·17(H2O)

Comments: Yellow metavoltine with white alunogen.
Location: Carola Mine, Freital, near Dresden, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Metazeunerite: Cu(UO2)2(AsO4)2·8(H2O)  
Trogerite: H2(UO2)2(AsO4)2·8(H2O)

Comments: Yellow crystals of trögerite with green metazeunerite.
Location: Walpurgis Flats, Weißer Hirsch Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag