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Teepleite: Na2B(OH)4Cl
Comments: Tan bladed crystals teepleite on massive halite. Location: Borax Lake, Lake County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tegengrenite: (Mg,Mn++)2Sb+++++0.5(Mn+++,Si,Ti)0.5O4
Comments: Red, pseudo-octahedral crystal of tegengrenite in quartz. Location: Jakobsberg, Nordmark, Filipstad, Värmland, Sweden. Scale: Picture size 0.8 mm. © Thomas Witzke / Abraxas-Verlag
Teineite: CuTeO3·2(H2O)
Comments: Green teineite on matrix. Location: Salm Chateau, Vielsalm, Belgium. Scale: Picture Size 4mm. © Thomas Witzke
Telargpalite: (Pd,Ag)3Te Oulankaite: (Pd,Pt)5(Cu,Fe)4SnTe2S2 Tulameenite: Pt2FeCu Chalcopyrite: CuFeS2
Comments: Gray long-prismatic crystal of oulankaite with light grayish telargpalite and pale yellowish-white rims of tulameenite in massive yellowish chalcopyrite. Polished section (from microprobe analysis) in reflected light. Location: Lukkulaisvaara ultrabasic Massif, Olanga (Oulanka) River, Oulanka plutonic complex, Karelia Republic, Northern Region, Russia. Scale: Picture size 0.12 mm. © Thomas Witzke / Abraxas-Verlag
Tellurantimony: Sb2Te3 Mattagamite: CoTe2 Altaite: PbTe
Comments: Silvery metallic intergrowths of mattagamite with tellurantimony and altaite. Location: Mattagami Lake Mine, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tellurite: TeO2
Comments: Prismatic, reddish brown tellurite crystal clusters to 5-6mm in a vug,lined with drusy quartz. Location: Bambolla Mine, Moctezuma, Sonora, Mexico. Scale: Picture Size 2 cm. © Rob Lavinsky
Tellurite: TeO2 Denningite: (Mn,Zn)Te2O5
Comments: Vitreous colorless to very pale yellowish elongated crystals denningite with yellow tellurite. Location: Bambolla Mine, Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Comments: Scaly yellow tellurite on white quartz. Location: Mina Bambollita, Moctezuma, Sonora, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tellurium: Te
Comments: Crystalline native tellurium on quartz. Location: Rosia Montana (Verespatak), Transylvania, Romania. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tellurium: Te Empressite: AgTe
Comments: Bronze-colored microcrystals of empressite with bright native tellurium crystals. Location: Rex mine, Boulder County, Colorado, USA. Scale: 1.9 x 1.4 x 0.7 cm. © Richard Dale / Dale Minerals