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Synadelphite: (Mn,Mg,Ca,Pb)9(As+++O3)(As+++++O4)2(OH)9·2(H2O) (?)
Comments: Moss mine, Nordmark, Värmland, Sweden. Location: Black psuedo-octahedral crystals of synadelphite with cube modifications. Scale: See Image. © Rruff Database
Tadzhikite-(Y): Ca4(Y,Ce)2(Ti,Al,Fe+++,[ ])2[Si4B4O22](OH)2
Comments: Grayish brown crystals of tadzhikite-(Y) in matrix. Location: Dara-i-Pioz Glacier, Alayskiy (Alai) Range, Tien Shan Mountains, Tajikistan. Scale: See Image. © Rruff Database
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
Tolovkite: IrSbS
Comments: Dark gray metallic crystal of tolovkite embedded in epoxy. Location: Placer from Ust-Belsky Massif, Korjak Highand, Russia. Scale: See Image. © Rruff Database
Trattnerite: (Fe,Mg)2(Mg,Fe)3(Si12O30)
Comments: Dark-blue hexagonal plate of trattnerite in matrix. Location: Stradner Kogel Mountain, Wilhelmsdorf, Bad Gleichenberg, Styria, Austria. Scale: See Image. © Rruff Database
Trembathite: (Mg,Fe++)3B7O13Cl
Comments: Blue-green pseudocubic trembathite crystal. Location: Salt Springs deposit (Salt Springs evaporite deposit), Sussex, Kings Co., New Brunswick, Canada. Scale: See Image. © Rruff Database
Tsepinite-Ca: (Ca,K,Na,[ ])2(Ti,Nb)2(Si4O12)(OH,O)2·4(H2O)
Comments: Groups of tan colored parallel prismatic tsepinitie-Ca crystals associated with eudialyte and arfvedsonite. Location: Hackmann Valley, Yukspor Mountain, Khibiny, Kola, Russia. Scale: See Image. © Rruff Database
Tsepinite-K: (K,Ba,Na)2(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O)
Comments: Light orange acicular crystals of tsepinite_K. Location: Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaya Oblast'; Northern Region,. Scale: See Image. © Rruff Database
Tsepinite-Na: (Na,H3O,K,Sr,Ba)2(Ti,Nb)2[Si4O12](OH,O)2·3(H2O)
Comments: Subparallel pale tan prismatic tsepinite-Na crystals with vitreous luster. Location: Lepkhe-Nel'm Mt. (Lepkhe-Nelm Mt.), Seidozero Lake, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: See Image. © Rruff Database
Tundrite-(Ce): Na2Ce2TiO2(SiO4)(CO3)2
Comments: Brown elongated bladed tundrite-(Ce) crystals associated with white orthoclase and black amphibole. Location: Barkeviksjaer, Norway. Scale: See Image. © Rruff Database