Mineral Specimen Images (T)

Thaumasite: Ca3Si(CO3)(SO4)(OH)6·12(H2O)

Comments: Doubly-terminated Thaumasite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 1 cm across.
© John Veevaert

Thaumasite: Ca3Si(CO3)(SO4)(OH)6·12(H2O)

Comments: Transparent crystal of thaumasite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 1.1 x 0.4 cm.
© John Veevaert

Theisite: Cu5Zn5[(As+++++,Sb+++++)O4]2(OH)14

Comments: Pale blue pearly theisite scattered on matrix.
Location: Grand Junction, Mesa County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Thenardite: Na2SO4

Comments: White thenardite on augite-nephelinite rock.
Location: Bärenstein Quarry, Niederschlag, Oberwiesenthal, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Theophrastite: Ni(OH)2  
Chromite: Fe++Cr2O4

Comments: Green pearly scaly theophrastite coatings on massive dark chromite.
Location: Vermion Region, near Thessaloniki, Kedriki Makedhonia, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Thermessaite: K2[AlF3SO4]

Comments: BSE image of thermessaite crystals. (CanMin v46:693).
Location: La Fossa crater, Vulcano, Aeolian Islands, Italy. Scale: See Image.
© Canadian Mineralogist

Thermonatrite: Na2CO3·(H2O)  
Nacaphite: Na(Na,Ca)2(PO4)F

Comments: Sparse pale yellow-brown microcrystal and crystalline nacaphite with white thermonatrite on a dark matrix.
Location: Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Thermonatrite: Na2CO3·(H2O)

Comments: Granular thermonatrite.
Location: Eruption of 1859, Vesuvius, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Thomasclarkite-(Y): (Na,Ce)(Y,REE)(HCO3)(OH)3·4(H2O)

Comments: Transparent, yellowish crystal of thomasclarkite-(Y).
Location: Mt. St. Hilaire, Quebec, Canada. Scale: 0.75 mm.
© John Veevaert

Thometzekite: Pb(Cu,Zn)2(AsO4)2·2(H2O)

Comments: Pale olive-green colored thometzekite crusts on quartz.
Location: Moldovo. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Thomsenolite: NaCaAlF6·(H2O)  
Cryolite: Na3AlF6

Comments: Massive, white cryolite with solution cavities lined with prismatic Thomsenolite crystals.
Location: Ivigtut, Greenland. Scale: .
© John Veevaert

Thomsonite-Ca: NaCa2Al5Si5O20·6(H2O)  
Stilbite-Ca: NaCa4[Al8Si28O72]·n(H2O) (n=28-32)

Comments: Peach colored stilbite crystals to 3.5 cm in size is hosting two finely crystallized balls of powdery white thomsonite.
Location: Near Jalgaon, Maharashtra State, India. Scale: Picture size 15 cm.
© Dan Weinrich

Thomsonite-Sr: (Sr,Ca)2Na[Al5Si5O20]·7(H2O)

Comments: White, columnar-acicular crystals of shomsonite-Sr lining a vug.
Location: Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 0.5 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Thorbastnasite: Th(Ca,Ce)(CO3)2F2·3(H2O)  
Rontgenite-(Ce): Ca2(Ce,La)3(CO3)5F3

Comments: Tny white, acicular thorbastnasite crystals to less than 1 mm in sprays. The thorbastnasite forms the cores the 'needles', with white epitaxial rontgenite-(Ce) coating.
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Needle Size < 1 mm.
© William Lechner / Dakota Matrix

Thoreaulite: Sn++Ta2O6

Comments: Yellow thoreaulite grain.
Location: Ognevka Ta Deposit, Kalba Range, Shyghys Qazaqstan Oblysy (Vostochno-Kazakhstanskaya [Eastern-Kazakhstan] Oblast'), Kazakhstan. Scale: Grain size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Thorianite: ThO2

Comments: Thorianite penetration twin.
Location: Huddersfield, Quebec, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Thorikosite: Pb3(Sb+++,As+++)O3(OH)Cl2

Comments: Yellow, prismatic crystals of Thorikosite on matrix.
Location: Passa Limani Cove slag locality, Passa Limani area, Lavrion District, Attikí (Attica; Attika) Prefecture, Greece. Scale: Picture size 1.6 mm.
© Thomas Witzke / Abraxas-Verlag

Thorite: ThSiO4

Comments: Brown crude crystal of thorite var. uranothorite with still visible termination on both ends. Mildly radioactive.
Location: Kemp Uranium Mine, Cheddar, Cardiff Township, Haliburton Co., Ontario, Canada. Scale: 15x14x13 mm.
© John Betts - Fine Minerals

Thorite: ThSiO4

Comments: Several small, black cubic crystals of thorite.
Location: Balangoda, Ratnapura, Sabaragamuwa province, Sri Lanka. Scale: Picture size 0.8 cm.
© Paul M. Schumacher

Thornasite: Na12Th3[Si8O19]4·18(H2O)

Comments: Opaque thornasite microcrystals.
Location: DeMix-Varennes Quarry, Saint Amable Sill, Varennes, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species