Mineral Specimen Images (T)

Thorogummite: Th(SiO4)1-x(OH)4x

Comments: Yellow-tan resinous thorogummite with calcite.
Location: Fort Dauphin, Toliara, Madagascar. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Thorogummite: Th(SiO4)1-x(OH)4x

Comments: Pale tan to yellowish thorogummite pseudomorphous after thorite in matrix.
Location: Fort Dauphin (Tôlanaro) area, Toliara (Tuléar) Province, Madagascar. Scale: Picture size 5 mm.
© Paul M. Schumacher

Thortveitite: (Sc,Y)2Si2O7

Comments: Small white prismatic crystals of thortveitite on matrix.
Location: A4 highway tunnel, Thiemendorf, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 1.7 mm.
© Thomas Witzke / Abraxas-Verlag

Thorutite: (Th,U,Ca)Ti2(O,OH)6

Comments: Spherical aggregate of black thorutite.
Location: Brumado, Brazil. Scale: Sphere Diameter 0.25 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Threadgoldite: Al(UO2)2(PO4)2(OH)·8(H2O)

Comments: Beige threadgoldite filling cracks in, and coating, black uraninite. Schumacher Collection.
Location: Kobokobo Pegmatite, Lusungu River District, Kivu, Congo (Zaïre). Scale: Picture size 5 mm.
© Paul M. Schumacher

Tiemannite: HgSe

Comments: Dull black tiemannite masses on limestone.
Location: Marysvale, Piute County, Utah. USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tiemannite: HgSe

Comments: Dull steel-gray, tetragonal crystals of tiemannite to 0.5mm with modifications and striations, slight purple tinge.
Location: Rio Blanco, Pinal De Arvole, Atriagu, Queretare, Mexico. Scale: Picture size 2 mm.
© Tom Loomis / Dakota Matrix

Tiemannite: HgSe  
Tischendorfite: Pd8Hg3Se9  
Chrisstanleyite: Ag2Pd3Se4

Comments: Polished section (PPL) showing tischendorfite (T, cream), clausthalite (Cl, off-white), tiemannite (Tie, gray), ankerite (black) and chrisstanleyite (C, greenish buff to pale brown).
Location: Eskaborner Stollen (Eskeborn Adit) at Tilkerode, Harz, Mountains, Germany. (CanMin v40:739). Scale: Picture Size 275 µm.
© Canadian Mineralogist

Tienshanite: BaNa2MnTiB2Si6O20  
Kupletskite-(Cs): (Cs,K)2Na(Mn,Fe++,Li)7(Ti,Nb)2Si8O26(OH)4F

Comments: Dark olive-green colored crystalline tienshanite with cesium-kupletskite in microcline.
Location: Dara-Pioz, Tien-Shan, Tadzhikistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tikhonenkovite: SrAl(OH)F4·(H2O)

Comments: Colorless tikhonenkovite grain.
Location: Karasug Fe-REE-barite-fluorite Deposit, Tannu-Ola Range, Tuva Republic, Eastern-Siberian Region, Russia. Scale: Grain length 1.8 mm.
© Thomas Witzke / Abraxas-Verlag

Tilasite: CaMg(AsO4)F

Comments: Brownish, prismatic crystals of tilasite.
Location: Cervandone, Val d'Ossola Lombardy, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Tilleyite: Ca5Si2O7(CO3)2

Comments: Opaque white fibrous tilleyite with blue calcite.
Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tin: Sn

Comments: Stream rounded silvery metallic tin grains.
Location: Near Oban, New South Wales, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tin: Sn  
Sorosite: Cu(Sn,Sb)  
Stistaite: SnSb

Comments: Back-scattered electron image of large sorosite crystal (So=partly skeletal) adjacent to stistaite (St). Tn=native tin. Note abundant microcrystals of sorosite isolated within native tin. (AmMin 83:903).
Location: Baimka gold-platinum group mineral placer deposit, Chukotka, Russian Far East. Scale: Image Size 1.5 cm.
© American Mineralogist

Tinaksite: K2Na(Ca,Mn++)2(Ti,Fe)O[Si7O18(OH)]  
Charoite: K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)·3(H2O)

Comments: Yellow-brown prismatic tinaksite crystals in purple charoite with black aegirine.
Location: Murun, Aldan Uplift, Chara and Olekma Rivers, near Olekminsk, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tinaksite: K2Na(Ca,Mn++)2(Ti,Fe)O[Si7O18(OH)]  
Charoite: K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)·3(H2O)

Comments: Polished slab of deep purple chariote with inclusions of black augite, white feldspar and orange tinaksite.
Location: Murun, Siberia, Russia. Scale: Picture size 10 cm.
© Kevin Ward

Tincalconite: Na6[B4O5(OH)4]3·8(H2O)

Comments: Pristine white tincalconite pseudomorph after a single borax crystal.
Location: Boron, Kramer District, Kern Co., California, USA. Scale: 30x14x5 mm.
© John Betts - Fine Minerals

Tinsleyite: KAl2(PO4)2(OH)·2(H2O)  
Phosphosiderite: Fe+++PO4·2(H2O)  
Rockbridgeite: (Fe++,Mn)Fe+++4(PO4)3(OH)5

Comments: Violet botryoidal tinsleyite on bluish-purple botryoidal phosphosiderite on dark, massive rockbridgeite.
Location: Bendada, Guarda, Portugal. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tinticite: Fe+++5(PO4,VO4)4·7(H2O)

Comments: Porcelaneous tinticite chip.
Location: Near Tintic Standard Mine, Tintic District, Juab County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Tintinaite: Pb22Cu+4(Sb,Bi)30S69

Comments: Massive silvery metallic tintinaite in matrix.
Location: Roznava, Slovak Republic. Scale: Specimen Size 2 x 4 cm.
© Diederik Visser