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.
Terskite: Na4ZrSi6O15(OH)2·2(H2O)
Comments: Pale violet terskite fragment. Location: Mount Rasvumchorr, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tertschite: Ca4B10O19·20(H2O)
Comments: Bright white fibrous powdery tertschite. Location: Kurtpinari Mine, Faras, Balikesir, Turkey. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Teruggite: Ca4MgAs2B12O22(OH)12·12(H2O)
Comments: Opaque rounded teruggite aggregate. Location: Loma Blanca, Jujuy, Argentina. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tetra-auricupride: AuCu
Comments: Golden brown crystals of tetra-auricupride on matrix. Location: Karabash (Karabasch), Chelyabinsk Oblast', Urals Region, Russia. Scale: Picture size 2 mm. © Thomas Witzke / Abraxas-Verlag
Tetradymite: Bi2Te2S
Comments: Gray metallic foliated tetradymite in quartz. Location: Mangfallberg, Boliden, Vasterbotten, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tetraferriannite: K(Fe++,Mg)3(Fe+++,Al)Si3O10(OH)2
Comments: Brownish black crystal fragment of tetraferriannite showing the micaceous cleavage. Location: Bancroft District, Hastings Co., Ontario, Canada. Scale: Sample Size 1 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Tetraferriphlogopite: KMg3Fe+++Si3O10(OH)2
Comments: Euhedral complete tabular crystal of dark brown tetraferriphlogopite with calcite, yellow-green apatite-(CaF), metallic chalcopyrite, and dark magnetite. Location: Zheleznyi Mine (Iron Mine), Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Crystal Size 3.5x3x1.5 cm. © Pavel M. Kartashov
Tetraferroplatinum: PtFe
Comments: Tetraferroplatinum (dark grey) intergrown with, and rimmed by Pt-Fe alloy (bright) ranging in composition from Pt1.6Fe to Pt2.2Fe. (CanMin v43:1711). Location: PGM grains from stream sediments, Eastern Bushveld Complex, South Africa. Scale: See Image. © Canadian Mineralogist
Tetrahedrite: (Cu,Fe)12Sb4S13
Comments: Bright sharp metallic tetrahedrite crystals to 1 cm in size on pinkish to colorless crystalline calcite matrix. Location: Cavnic (Kapnik), Maramures, Romania. Scale: 14 x 11 x 3 cm. © Dan Weinrich
Comments: A very brilliant tetrahedrite group with the tops of the crystals covered in chalcopyrite. Location: Casapalca, Lima, Peru. Scale: 8 x 6 cm. © Fabre Minerals