Thomas Witzke's Image Gallery

Hochelagaite: (Ca,Na,Sr)Nb4O11·8(H2O)

Comments: White aggregate of small fibrous crystals of hochelagaite in matrix.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Québec, Canada. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Hoelite: (C6H4)2(CO)2

Comments: Yellow acicular crystals of hoelite with blocky yellow crystals of sulfur.
Location: Carola Mine, Freital, near Dresden, Saxony, Germany. Scale: Picture size 10 mm.
© Thomas Witzke / Abraxas-Verlag

Hollandite: Ba(Mn++++,Mn++)8O16

Comments: Gray, feathery aggregates of hollandite.
Location: Sieben Brüder Mine, Langenberg, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Hollingworthite: (Rh,Pt,Pd)AsS  
Laurite: RuS2

Comments: Gray grain of hollingworthite (in the center of the picture) with very slightly darker gray laurite (at the right margin). Polished section (from microprobe analysis).
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag

Hollingworthite: (Rh,Pt,Pd)AsS  
Laurite: RuS2

Comments: Gray laurite with two smaller grains of hollingworthite (left and right from the laurite, very slightly lighter gray). Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.15 mm.
© Thomas Witzke / Abraxas-Verlag

Hongshiite: PtCu  
Palladodymite: (Pd,Rh)2As  
Ruthenium: (Ru,Ir,Os)

Comments: Palladodymite (light gray, in two small grains), hongshiite (pale creamy grayish, tarnished brownish) in massive ruthenium. Polished section (from microprobe analysis) in reflected light.
Location: Miass River, Zlatoust, Ilmen Mts, Chelyabinsk Oblast', Urals Region, Russia. Scale: Picture size 0.09 mm.
© Thomas Witzke / Abraxas-Verlag

Horvathite-(Y): NaY(CO3)F2

Comments: Blocky crystals of horvathite-(Y) in matrix.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Québec, Canada. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Humboldtine: Fe++(C2O4)·2(H2O)

Comments: Yellow crystals of humboldtine.
Location: Lomnice, Sokolov, Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Hummerite: KMgV+++++5O14·8(H2O)

Comments: Orange-yellow hummerite on fossil wood.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Specimen size 65 mm.
© Thomas Witzke / Abraxas-Verlag

Hunchunite: (Au,Ag)2Pb

Comments: Bluish-gray hunchunite in a polished section in reflected light.
Location: Nizhne-Tagil'skoye (Mednorudyanskoye) Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Picture size 0.2 mm.
© Thomas Witzke / Abraxas-Verlag

Hydromagnesite: Mg5(CO3)4(OH)2·4(H2O)

Comments: White, blocky crystals of hydromagnesite.
Location: Lobming, Styria, Austria. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Hydroniumjarosite: (H3O)Fe+++3(SO4)2(OH)6

Comments: Yellow, earthy hydronium-jarosite.
Location: Reiche Zeche Mine, Himmelfahrt Mine, Freiberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Specimen size 3.3 cm.
© Thomas Witzke / Abraxas-Verlag

Hydrowoodwardite: Cu1-xAlx(OH)2(SO4)x/2·n(H2O) with 0 < x < 0.67 and n > 3x/2

Comments: Massive blue to greenish-blue hydrowoodwardite.
Location: St Christoph Mine, Bärenhecke, Glashütte, Erzgebirge, Saxony, Germany. Scale: Specimen size 3.4 cm.
© Thomas Witzke / Abraxas-Verlag

Hydroxycancrinite: Na4(AlSiO4)3(OH)·(H2O)

Comments: Pale grayish-blue, massive hydroxycancrinite.
Location: Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Iimoriite-(Y): Y2(SiO4)(CO3)

Comments: Nearly colorless prismatic crystal of immolate-(Y) on dolomite.
Location: Trimouns Talc Mine, Luzenac, Ariège, Midi-Pyrénées, France. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Ilesite: (Mn,Zn,Fe++)SO4·4(H2O)

Comments: Botryoidal to earthy, cream-colored ilesite.
Location: Chvaletice, Kutná Hora, Stredoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Ilinskite: NaCu5O2(SeO3)2Cl

Comments: Dark green crystals of ilinskite on matrix.
Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Ilsemannite: Mo3O8·n(H2O) (?)

Comments: Dark blue ilsemannite.
Location: Glückauf Shaft, Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Imhofite: Tl6CuAs16S40

Comments: Dark red crystals and aggregates of imhofite in matrix.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Indium: In

Comments: A grain of native indium.
Location: Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag