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Tinzenite: (Ca,Mn,Fe)3Al2BO3Si4O12(OH)
Comments: Orange crystalline tinzenite with quartz and black braunite. Location: Cassagne mine, near Chiavari, Liguria, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Orange bladed aggregate of tinzenite crystals and clear quartz. Location: Molinello mine, Val Graveglia, Italy. Scale: 5.8x3.6x3.3 cm. © Richard Dale / Dale Minerals
Tiptopite: K2(Na,Ca)2Li3Be6(PO4)6(OH)2·(H2O) Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O)
Comments: Clear, acicular crystals of tiptopite with red montgomeryite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tiptopite: K2(Na,Ca)2Li3Be6(PO4)6(OH)2·(H2O) Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O) Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O)
Comments: Red montgomeryite lath-like crystals to 1mm in 2mm rosettes associated with clear, acicular sprays of tiptopite to 0.75mm and white cottonball-like crystals of englishite to 0.2mm. Location: Tip Top mine, Custer Co., South Dakota, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Tiragalloite: Mn++4As+++++Si3O12(OH)
Comments: Orange crystals of tiragalloite in matrix. Location: Molinello Mine, Val Graveglia, Liguria, Italy. Scale: Picture size 7 mm. © Thomas Witzke / Abraxas-Verlag
Tischendorfite: Pd8Hg3Se9 Tiemannite: HgSe 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
Tisinalite: Na3H3(Mn++,Ca,Fe)TiSi6(O,OH)18·2(H2O)
Comments: Yellow tisinalite in syenite pegmatite matrix. Location: Mount Alluaiv, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tistarite: Ti2O3 Khamrabaevite: (Ti,V,Fe)C
Comments: BSE image showing one tistarite (Ti2O3) grain along with khamrabaevite (TiC) and corundum. The cross marks where the electron back-scattered diffraction pattern (shown in Fig. 4) was collected. (AmMin, v94:841. Location: From inside a chondrule from the Allende meteorite. Scale: See Image. © American Mineralogist
Titanite: CaTiSiO5
Comments: Several twinned green crystals of Titanite (sphene) on matrix. Location: Capelinha, Minas Gerais, Brazil. Scale: 5.5x5x3.5 cm. © Isaias Casanova / IC Minerals
Titanite: CaTiSiO5 Amesite: Mg2Al(SiAl)O5(OH)4
Comments: Green titanite (sphene) crystals on purple chromamesite (clinochlore?). Location: Saranovskaya Deposit, Middle Ural Mountains, Russia. Scale: Picture size 7 cm. © Dave Barthelmy
Titanowodginite: (Mn++,Fe++)(Ti,Sn)(Ta,Nb)2O8
Comments: Black crystals of titanowodginite in matrix. Location: Tanco Mine (Bernic Lake Mine), Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Titantaramellite: Ba4(Ti,Fe+++,Fe++,Mg)4(B2Si8O27)O2Clx X=0 TO 1, with Ti > Fe
Comments: Dark brownish black titantaramellite crystal in quartz. Location: Rush Creek, Fresno County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Titantaramellite: Ba4(Ti,Fe+++,Fe++,Mg)4(B2Si8O27)O2Clx X=0 TO 1, with Ti > Fe Alforsite: Ba5(PO4)3Cl Sanbornite: BaSi2O5 Celsian: BaAl2Si2O8
Comments: SEM image showing alforsite (al). Matrix composed by lamellar sanbornite (sa) and granular quartz (q). Rectangular crystal in the upper right corner is titantaramellite (ti) and isometric crystals included in sanbornite are celsian (ce). Location: Trumbull Peak, near Incline, Mariposa Co., California, USA. Scale: See Image. © Pavel M. Kartashov
Tlalocite: Cu10Zn6(Te++++O3)(Te++++++O4)2Cl(OH)25·27(H2O)
Comments: Green, spherulitic aggregates of Tlalocite on matrix. Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
Tlapallite: H6(Ca,Pb)2Cu3(SO4)(Te++++O3)4(Te++++++O6)
Comments: Green, microcrystalline druse of tlapallite grains. Location: Bambollita Mine (Oriental Mine), Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Tobelite: (NH4,K)Al2(Si3Al)O10(OH)2
Comments: Fine grained massive tobelite. Location: Tobe, Ehime, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tobermorite: Ca5Si6O16(OH)2·4(H2O)
Comments: Bright white tobermorite with blue calcite, USA. Location: Crestmore Quarry, Riverside County, California. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tochilinite: 6Fe0.9S·5(Mg,Fe++)(OH)2
Comments: Grayish-black, metallic wires of tochilinite on matrix. Location: Brosso Mine, Ivrea, Piedmont, Italy. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Tocornalite: (Ag,Hg)I (?)
Comments: Pale yellow granular tocornalite in matrix. Location: Block 14 Opencut, Broken Hill, Yancowinna Co., New South Wales, Australia. Scale: See Image. © Rruff Database
Todorokite: (Na,Ca,K)2(Mn++++,Mn+++)6O12·3-4.5(H2O) Opal: SiO2·n(H2O)
Comments: Dendritic todorokite in white opal. Location: Brosso Mine, Ivrea, Torino, Piemonte, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species