Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Tetranatrolite: Na2[Al2Si3O10]·2(H2O) Gonnardite: Na2CaAl4Si6O20·7(H2O)
Comments: White, pseudocubic crystals of tetranatrolite (gonnardite) on matrix. Location: Point of Rocks Mesa, Colfax County, New Mexico, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tetrawickmanite: Mn++Sn++++(OH)6
Comments: Tan, pseudoctahedral crystal of tetrawickmanite on matrix. Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Thorianite: ThO2
Comments: Thorianite penetration twin. Location: Huddersfield, Quebec, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
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
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
Trechmannite: AgAsS2
Comments: Dark red, trigonal pyramid crystal of trechmannite on dolomite. Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tridymite: SiO2
Comments: Clear, pseudohexagonal crystals of tridymite on matrix. Location: Bellerberg quarry, Laacher See, Rhineland-Palatinate, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tschernichite: (Ca,Na)(Si6Al2)O16·4-8(H2O)
Comments: Clear crystal of tschernichite in a vug. Location: Goble, Colombia County, Oregon, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tsumcorite: PbZnFe++(AsO4)2·(H2O)
Comments: Yellow tsumcorite crystalline rosettes on matrix. Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tsumebite: Pb2Cu(PO4)(SO4)(OH)
Comments: Green crystalline aggregates of tsumebite on matrix. Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals