Thomas Witzke's Image Gallery

Rosickyite: S

Comments: Orange selenian rosickyite (containing 48.9 wt-% Se).
Location: Lichtenberg Mine, Ronneburg U Deposit, Gera district, Thuringia, Germany. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Rosslerite: Mg(AsO3OH)·7(H2O)

Comments: Colorless crystals of rösslerite.
Location: Jáchymov (St Joachimsthal), Krusné Hory (Erzgebirge), Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Rostite: AlSO4(OH,F)·5(H2O)  
Clairite: (NH4)2Fe+++3(SO4)4(OH)3·3(H2O)

Comments: Brownish crystals of clairite on white massive rostite.
Location: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Rostite: AlSO4(OH,F)·5(H2O)

Comments: White crystals of rostite on a dark matrix.
Location: Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Russellite: Bi2WO6

Comments: Pale yellowish beige veinlet and thin crusts of russellite.
Location: Himmelfahrt Mine, Steinbach, Johanngeorgenstadt, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

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

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

Sabieite: (NH4)Fe+++(SO4)2

Comments: Massive, porous aggregate of sabieite.
Location: Carola Mine, Freital, Dresden, Saxony, Germany. Scale: Picture size 4.5 cm.
© Thomas Witzke / Abraxas-Verlag

Sakuraiite: (Cu,Zn,Fe,In,Sn)4S4

Comments: Dark gray sakuraiite ore.
Location: Ikuno Mine, Kanagase, Asago-Gun-Hyogo, Japan. Scale: Specimen Size 2 cm.
© Thomas Witzke

Salammoniac: NH4Cl  
Erythrosiderite: K2Fe+++Cl5·(H2O)

Comments: Orange-brown aggregates of erythrosiderite with sal ammoniac. Material from the 1926 eruption of the Erythrosiderite is hygroscopic and must be stored in a closed vial. The photo was made through the vial.
Location: Vesuvius, Naples Province, Campania, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Samarskite-(Y): (Y,Fe+++,U)(Nb,Ta)5O4

Comments: A black crystal of samarskite. Ex collection Gustav Rose 1832, found on his travel together with Alexander von Humboldt through the Ural Mts.
Location: Miass, Ilmen Mts, Chelyabinsk Oblast', Urals Region, Russia. Scale: Crystal size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Samuelsonite: (Ca,Ba)Ca8(Fe++,Mn)4Al2(PO4)10(OH)2

Comments: Transparent crystal of samuelsonite.
Location: Palermo #1 mine, Groton, Grafton Co., New Hampshire, USA. Scale: Picture size 2.2 mm.
© Thomas Witzke / Abraxas-Verlag

Santabarbaraite: Fe+++3(PO4)2(OH)3·5(H2O)

Comments: Orange santabarbaraite pseudomorphous after vivianite.
Location: Santa Barbara lignite district, San Giovanni Valdarno, Valdarno (Val d'Arno), Arezzo Province, Tuscany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Sassolite: H3BO3

Comments: Colorless, pseudohexagonal crystals of sassolite.
Location: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

Sazykinaite-(Y): Na5YZrSi6018·6(H2O)

Comments: Light brown crystals of sazykinaite-(Y).
Location: Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Scarbroite: Al5(CO3)(OH)13·5(H2O)

Comments: White earthy scarbroite.
Location: South Bay, Scarborough, North Yorkshire, England, UK. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Schieffelinite: Pb(Te++++++,S)O4·(H2O)  
Rodalquilarite: H3Fe+++2(Te++++O3)4Cl

Comments: Creamy white Schieffelinite with minor green rodalquilarite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Schmitterite: (UO2)TeO3  
Emmonsite: Fe+++2Te++++3O9·2(H2O)

Comments: Yellow schmitterite with green emmonsite.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Schneebergite: Bi(Co,Ni)2(AsO4)2(OH,H2O)2

Comments: Prismatic, acicular crystals of schneebergite.
Location: Roter Berg, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.7 mm.
© Thomas Witzke / Abraxas-Verlag

Schoenfliesite: MgSn++++(OH)6

Comments: Yellow-brown schoenfliesite on matrix.
Location: Zlaty Kopec, Jáchymov (St Joachimsthal), Krusné Hory (Erzgebirge), Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Schrockingerite: NaCa3(UO2)(CO3)3(SO4)F·10(H2O)

Comments: Pale greenish-yellow schröckingerite aggregates on matrix.
Location: St Christoph Mine, Bärenhecke, Glashütte, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag